Mixing
Android Studio: Custom Writer Class extends BufferedWriter, uses super and this.write (PemWriter)
The following is an example of the Class that I have to use. I'm trying to figure out how to use it. So, I can't change this part, only what's in my activity:
package com.example.android.datafrominternet.utilities;
import android.util.Log;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;
public class MyWriter extends BufferedWriter {
public MyWriter(Writer out)
{
super(out);
}
public void writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
Log.d("LOOK HERE", "writeTest was accessed successfully"+repeatthis);
}
}
This is what's in my activity:
String iwantThisString = "";
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
iwantThisString = writer.toString(); //Does not work.
} catch (IOException e) {
e.printStackTrace();
}
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
How do I get iwantThisString, to pick up what writeTest is laying down?
If you want to see the actual class that I'm trying to use, it's the pemWriter from Spongy Castle.
java
android bouncycastle spongycastle asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
add a comment |
The following is an example of the Class that I have to use. I'm trying to figure out how to use it. So, I can't change this part, only what's in my activity:
package com.example.android.datafrominternet.utilities;
import android.util.Log;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;
public class MyWriter extends BufferedWriter {
public MyWriter(Writer out)
{
super(out);
}
public void writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
Log.d("LOOK HERE", "writeTest was accessed successfully"+repeatthis);
}
}
This is what's in my activity:
String iwantThisString = "";
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
iwantThisString = writer.toString(); //Does not work.
} catch (IOException e) {
e.printStackTrace();
}
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
How do I get iwantThisString, to pick up what writeTest is laying down?
If you want to see the actual class that I'm trying to use, it's the pemWriter from Spongy Castle.
java
android bouncycastle spongycastle asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49
add a comment |
The following is an example of the Class that I have to use. I'm trying to figure out how to use it. So, I can't change this part, only what's in my activity:
package com.example.android.datafrominternet.utilities;
import android.util.Log;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;
public class MyWriter extends BufferedWriter {
public MyWriter(Writer out)
{
super(out);
}
public void writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
Log.d("LOOK HERE", "writeTest was accessed successfully"+repeatthis);
}
}
This is what's in my activity:
String iwantThisString = "";
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
iwantThisString = writer.toString(); //Does not work.
} catch (IOException e) {
e.printStackTrace();
}
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
How do I get iwantThisString, to pick up what writeTest is laying down?
If you want to see the actual class that I'm trying to use, it's the pemWriter from Spongy Castle.
java
android bouncycastle spongycastle asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
The following is an example of the Class that I have to use. I'm trying to figure out how to use it. So, I can't change this part, only what's in my activity:
package com.example.android.datafrominternet.utilities;
import android.util.Log;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.Writer;
public class MyWriter extends BufferedWriter {
public MyWriter(Writer out)
{
super(out);
}
public void writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
Log.d("LOOK HERE", "writeTest was accessed successfully"+repeatthis);
}
}
This is what's in my activity:
String iwantThisString = "";
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
iwantThisString = writer.toString(); //Does not work.
} catch (IOException e) {
e.printStackTrace();
}
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
How do I get iwantThisString, to pick up what writeTest is laying down?
If you want to see the actual class that I'm trying to use, it's the pemWriter from Spongy Castle.
java
android bouncycastle spongycastle java
android bouncycastle spongycastle asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
edited Nov 21 '18 at 18:08
Adam Winter
asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
asked Nov 18 '18 at 22:07
Adam WinterAdam Winter
112
112
I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49
add a comment |
I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49
I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49
add a comment |
2 Answers
2
active
oldest
votes
Here's the full explanation for how this works, to the best of my knowledge (now that I figured it out):
public class MyWriter extends BufferedWriter {
In creating the class MyWriter that extends BufferedWriter, MyWriter becomes an identical class to BufferedWriter, until you change something.
public MyWriter(Writer out)
{
super(out);
}
This is the constructor. It looks like a method/function, but it's only called when you create a 'new MyWriter' and it is used to define that new object according these instructions. In this case, creating a new instance of MyWriter requires an input parameter '(Writer out)', which is the StringWriter named 'writer' in the activity. That is, it requires another Writer as an input and calls it 'out'. 'Super' sends 'out' up to the BufferedWriter. In doing this, you've "wrapped" the StringWriter in a BufferedWriter. In other words, you've put a StringWriter inside a BufferedWriter. The result combines the functionality of both kinds of Writer; a "buffered-string-writer" if you will.
public MyWriter writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
An important thing to note here is that 'this' refers to the BufferedWriter. It's essentially appending each string to an unnamed string that exists inside the BufferedWriter.
The most important thing is that you have to use 'flush()' to dump everything out of the BufferedWriter to get it where it's supposed to go. In this case, 'flush()' finally sends the string to the StringWriter, where it will remain, until you pull it out of there. The following is the proper working code:
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
} catch (IOException e) {
e.printStackTrace();
}
try {
myObjectWrites.flush();
myObjectWrites.close();
} catch (IOException e) {
e.printStackTrace();
}
return writer.toString();
Note that you close() the BufferedWriter object 'myObjectWrites' NOT the StringWriter object 'writer'. Also, according to documentation, 'close()' also flushes the BufferedWriter, but I'm still using 'flush()' to be safe.
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
add a comment |
Also, I've found that the following code does work with the spongy castle library, taken from:
Export RSA public key to PEM String using java
PublicKey publicKey = keyPair.getPublic();
StringWriter writer = new StringWriter();
PemWriter pemWriter = new PemWriter(writer);
pemWriter.writeObject(new PemObject("PUBLIC KEY", publicKey.getEncoded()));
pemWriter.flush();
pemWriter.close();
return writer.toString();
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here's the full explanation for how this works, to the best of my knowledge (now that I figured it out):
public class MyWriter extends BufferedWriter {
In creating the class MyWriter that extends BufferedWriter, MyWriter becomes an identical class to BufferedWriter, until you change something.
public MyWriter(Writer out)
{
super(out);
}
This is the constructor. It looks like a method/function, but it's only called when you create a 'new MyWriter' and it is used to define that new object according these instructions. In this case, creating a new instance of MyWriter requires an input parameter '(Writer out)', which is the StringWriter named 'writer' in the activity. That is, it requires another Writer as an input and calls it 'out'. 'Super' sends 'out' up to the BufferedWriter. In doing this, you've "wrapped" the StringWriter in a BufferedWriter. In other words, you've put a StringWriter inside a BufferedWriter. The result combines the functionality of both kinds of Writer; a "buffered-string-writer" if you will.
public MyWriter writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
An important thing to note here is that 'this' refers to the BufferedWriter. It's essentially appending each string to an unnamed string that exists inside the BufferedWriter.
The most important thing is that you have to use 'flush()' to dump everything out of the BufferedWriter to get it where it's supposed to go. In this case, 'flush()' finally sends the string to the StringWriter, where it will remain, until you pull it out of there. The following is the proper working code:
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
} catch (IOException e) {
e.printStackTrace();
}
try {
myObjectWrites.flush();
myObjectWrites.close();
} catch (IOException e) {
e.printStackTrace();
}
return writer.toString();
Note that you close() the BufferedWriter object 'myObjectWrites' NOT the StringWriter object 'writer'. Also, according to documentation, 'close()' also flushes the BufferedWriter, but I'm still using 'flush()' to be safe.
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
add a comment |
Here's the full explanation for how this works, to the best of my knowledge (now that I figured it out):
public class MyWriter extends BufferedWriter {
In creating the class MyWriter that extends BufferedWriter, MyWriter becomes an identical class to BufferedWriter, until you change something.
public MyWriter(Writer out)
{
super(out);
}
This is the constructor. It looks like a method/function, but it's only called when you create a 'new MyWriter' and it is used to define that new object according these instructions. In this case, creating a new instance of MyWriter requires an input parameter '(Writer out)', which is the StringWriter named 'writer' in the activity. That is, it requires another Writer as an input and calls it 'out'. 'Super' sends 'out' up to the BufferedWriter. In doing this, you've "wrapped" the StringWriter in a BufferedWriter. In other words, you've put a StringWriter inside a BufferedWriter. The result combines the functionality of both kinds of Writer; a "buffered-string-writer" if you will.
public MyWriter writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
An important thing to note here is that 'this' refers to the BufferedWriter. It's essentially appending each string to an unnamed string that exists inside the BufferedWriter.
The most important thing is that you have to use 'flush()' to dump everything out of the BufferedWriter to get it where it's supposed to go. In this case, 'flush()' finally sends the string to the StringWriter, where it will remain, until you pull it out of there. The following is the proper working code:
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
} catch (IOException e) {
e.printStackTrace();
}
try {
myObjectWrites.flush();
myObjectWrites.close();
} catch (IOException e) {
e.printStackTrace();
}
return writer.toString();
Note that you close() the BufferedWriter object 'myObjectWrites' NOT the StringWriter object 'writer'. Also, according to documentation, 'close()' also flushes the BufferedWriter, but I'm still using 'flush()' to be safe.
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
add a comment |
Here's the full explanation for how this works, to the best of my knowledge (now that I figured it out):
public class MyWriter extends BufferedWriter {
In creating the class MyWriter that extends BufferedWriter, MyWriter becomes an identical class to BufferedWriter, until you change something.
public MyWriter(Writer out)
{
super(out);
}
This is the constructor. It looks like a method/function, but it's only called when you create a 'new MyWriter' and it is used to define that new object according these instructions. In this case, creating a new instance of MyWriter requires an input parameter '(Writer out)', which is the StringWriter named 'writer' in the activity. That is, it requires another Writer as an input and calls it 'out'. 'Super' sends 'out' up to the BufferedWriter. In doing this, you've "wrapped" the StringWriter in a BufferedWriter. In other words, you've put a StringWriter inside a BufferedWriter. The result combines the functionality of both kinds of Writer; a "buffered-string-writer" if you will.
public MyWriter writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
An important thing to note here is that 'this' refers to the BufferedWriter. It's essentially appending each string to an unnamed string that exists inside the BufferedWriter.
The most important thing is that you have to use 'flush()' to dump everything out of the BufferedWriter to get it where it's supposed to go. In this case, 'flush()' finally sends the string to the StringWriter, where it will remain, until you pull it out of there. The following is the proper working code:
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
} catch (IOException e) {
e.printStackTrace();
}
try {
myObjectWrites.flush();
myObjectWrites.close();
} catch (IOException e) {
e.printStackTrace();
}
return writer.toString();
Note that you close() the BufferedWriter object 'myObjectWrites' NOT the StringWriter object 'writer'. Also, according to documentation, 'close()' also flushes the BufferedWriter, but I'm still using 'flush()' to be safe.
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
Here's the full explanation for how this works, to the best of my knowledge (now that I figured it out):
public class MyWriter extends BufferedWriter {
In creating the class MyWriter that extends BufferedWriter, MyWriter becomes an identical class to BufferedWriter, until you change something.
public MyWriter(Writer out)
{
super(out);
}
This is the constructor. It looks like a method/function, but it's only called when you create a 'new MyWriter' and it is used to define that new object according these instructions. In this case, creating a new instance of MyWriter requires an input parameter '(Writer out)', which is the StringWriter named 'writer' in the activity. That is, it requires another Writer as an input and calls it 'out'. 'Super' sends 'out' up to the BufferedWriter. In doing this, you've "wrapped" the StringWriter in a BufferedWriter. In other words, you've put a StringWriter inside a BufferedWriter. The result combines the functionality of both kinds of Writer; a "buffered-string-writer" if you will.
public MyWriter writeTest(String repeatthis) throws IOException {
this.write(repeatthis);
this.newLine();
this.write("along with this other stuff.");
An important thing to note here is that 'this' refers to the BufferedWriter. It's essentially appending each string to an unnamed string that exists inside the BufferedWriter.
The most important thing is that you have to use 'flush()' to dump everything out of the BufferedWriter to get it where it's supposed to go. In this case, 'flush()' finally sends the string to the StringWriter, where it will remain, until you pull it out of there. The following is the proper working code:
StringWriter writer = new StringWriter();
MyWriter myObjectWrites = new MyWriter(writer);
String myNewString = "I want to see this repeated back to me.";
try {
myObjectWrites.writeTest(myNewString);
} catch (IOException e) {
e.printStackTrace();
}
try {
myObjectWrites.flush();
myObjectWrites.close();
} catch (IOException e) {
e.printStackTrace();
}
return writer.toString();
Note that you close() the BufferedWriter object 'myObjectWrites' NOT the StringWriter object 'writer'. Also, according to documentation, 'close()' also flushes the BufferedWriter, but I'm still using 'flush()' to be safe.
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
answered Nov 21 '18 at 18:45
Adam WinterAdam Winter
112
112
add a comment |
add a comment |
Also, I've found that the following code does work with the spongy castle library, taken from:
Export RSA public key to PEM String using java
PublicKey publicKey = keyPair.getPublic();
StringWriter writer = new StringWriter();
PemWriter pemWriter = new PemWriter(writer);
pemWriter.writeObject(new PemObject("PUBLIC KEY", publicKey.getEncoded()));
pemWriter.flush();
pemWriter.close();
return writer.toString();
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
add a comment |
Also, I've found that the following code does work with the spongy castle library, taken from:
Export RSA public key to PEM String using java
PublicKey publicKey = keyPair.getPublic();
StringWriter writer = new StringWriter();
PemWriter pemWriter = new PemWriter(writer);
pemWriter.writeObject(new PemObject("PUBLIC KEY", publicKey.getEncoded()));
pemWriter.flush();
pemWriter.close();
return writer.toString();
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
add a comment |
Also, I've found that the following code does work with the spongy castle library, taken from:
Export RSA public key to PEM String using java
PublicKey publicKey = keyPair.getPublic();
StringWriter writer = new StringWriter();
PemWriter pemWriter = new PemWriter(writer);
pemWriter.writeObject(new PemObject("PUBLIC KEY", publicKey.getEncoded()));
pemWriter.flush();
pemWriter.close();
return writer.toString();
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
Also, I've found that the following code does work with the spongy castle library, taken from:
Export RSA public key to PEM String using java
PublicKey publicKey = keyPair.getPublic();
StringWriter writer = new StringWriter();
PemWriter pemWriter = new PemWriter(writer);
pemWriter.writeObject(new PemObject("PUBLIC KEY", publicKey.getEncoded()));
pemWriter.flush();
pemWriter.close();
return writer.toString();
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
edited Nov 21 '18 at 18:51
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
answered Nov 20 '18 at 20:56
Adam WinterAdam Winter
112
112
add a comment |
add a comment |
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I'm afraid you've neglected to ask a specific question.
– James K Polk
Nov 18 '18 at 22:13
I've added my specific questions. Thanks
– Adam Winter
Nov 18 '18 at 22:49