What exactly occurs when the while loop runs (what is done within the while loop)? (It's supposed to remove...

-1

 public String removeStrings()

 {  

    String cleaned = sentence; //sentence and remove are inputs

    int loc = cleaned.indexOf(remove);

    while (loc>-1) //need explanation on how this works

    { 

      cleaned = cleaned.substring(0, loc-1)+cleaned.substring(loc+remove.length());

      loc = cleaned.indexOf(remove);

    }

    return cleaned;

}

Example input sentence="xR-MxR-MHelloxR-M" and remove="R-M" //has to remove x as well in this case
https://github.com/AndrewWeiler/AndrewMac/blob/master/ACSWeiler/src/Lab09/StringRemover.java

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

indexOf returns -1 when it doesn't find remove in cleaned.

– Kevin Anderson
Nov 16 '18 at 23:57

2

You may want to read up on how indexOf and substring work.

– Kevin Anderson
Nov 17 '18 at 0:15

add a comment |

-1

 public String removeStrings()

 {  

    String cleaned = sentence; //sentence and remove are inputs

    int loc = cleaned.indexOf(remove);

    while (loc>-1) //need explanation on how this works

    { 

      cleaned = cleaned.substring(0, loc-1)+cleaned.substring(loc+remove.length());

      loc = cleaned.indexOf(remove);

    }

    return cleaned;

}

Example input sentence="xR-MxR-MHelloxR-M" and remove="R-M" //has to remove x as well in this case
https://github.com/AndrewWeiler/AndrewMac/blob/master/ACSWeiler/src/Lab09/StringRemover.java

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

indexOf returns -1 when it doesn't find remove in cleaned.

– Kevin Anderson
Nov 16 '18 at 23:57

2

You may want to read up on how indexOf and substring work.

– Kevin Anderson
Nov 17 '18 at 0:15

add a comment |

-1

 public String removeStrings()

 {  

    String cleaned = sentence; //sentence and remove are inputs

    int loc = cleaned.indexOf(remove);

    while (loc>-1) //need explanation on how this works

    { 

      cleaned = cleaned.substring(0, loc-1)+cleaned.substring(loc+remove.length());

      loc = cleaned.indexOf(remove);

    }

    return cleaned;

}

Example input sentence="xR-MxR-MHelloxR-M" and remove="R-M" //has to remove x as well in this case
https://github.com/AndrewWeiler/AndrewMac/blob/master/ACSWeiler/src/Lab09/StringRemover.java

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

 public String removeStrings()

 {  

    String cleaned = sentence; //sentence and remove are inputs

    int loc = cleaned.indexOf(remove);

    while (loc>-1) //need explanation on how this works

    { 

      cleaned = cleaned.substring(0, loc-1)+cleaned.substring(loc+remove.length());

      loc = cleaned.indexOf(remove);

    }

    return cleaned;

}

Example input sentence="xR-MxR-MHelloxR-M" and remove="R-M" //has to remove x as well in this case
https://github.com/AndrewWeiler/AndrewMac/blob/master/ACSWeiler/src/Lab09/StringRemover.java

java substring indexof

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

edited Nov 20 '18 at 23:32

Jere

531218

edited Nov 20 '18 at 23:32

Jere

531218

edited Nov 20 '18 at 23:32

Jere

531218

asked Nov 16 '18 at 23:54

javanoob

asked Nov 16 '18 at 23:54

javanoob

asked Nov 16 '18 at 23:54

javanoob

indexOf returns -1 when it doesn't find remove in cleaned.

– Kevin Anderson
Nov 16 '18 at 23:57

2

You may want to read up on how indexOf and substring work.

– Kevin Anderson
Nov 17 '18 at 0:15

add a comment |

indexOf returns -1 when it doesn't find remove in cleaned.

– Kevin Anderson
Nov 16 '18 at 23:57

2

You may want to read up on how indexOf and substring work.

– Kevin Anderson
Nov 17 '18 at 0:15

indexOf returns -1 when it doesn't find remove in cleaned.

– Kevin Anderson
Nov 16 '18 at 23:57

You may want to read up on how indexOf and substring work.

– Kevin Anderson
Nov 17 '18 at 0:15

add a comment |

1 Answer
1

active

oldest

votes

String.substring() either returns the part ob a String between two positions (in cleaned.substring(0, 1), that would be the content of cleaned between position 0 and 1) or if you give that method just 1 int-argument, it returns the part of your String, that comes after that position.

For example, with sentence="xR-MxR-MHelloxR-M" and remove="R-M" you would get:

cleaned = "xR-MxR-MHelloxR-M"

loc = 1

So the while-loop would go like this:

cleaned.substring(0, loc-1) returns "x" and cleaned.substring(loc+remove.length()) returns "xR-MHelloxR-M". So cleaned = "xxR-MHelloxR-M". Then, loc becomes the position of the next occurrence of remove.

In words, your while loop removes every occurrence of the String remove out of the String sentence and saves the result in cleaned.

For substring() check https://www.javatpoint.com/substring.

Edit:

If you want the first character before your substring to be removed too, you just need to say

loc = cleaned.indexOf(remove) - 1;

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

add a comment |

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1 Answer
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votes

For example, with sentence="xR-MxR-MHelloxR-M" and remove="R-M" you would get:

cleaned = "xR-MxR-MHelloxR-M"

loc = 1

So the while-loop would go like this:

In words, your while loop removes every occurrence of the String remove out of the String sentence and saves the result in cleaned.

For substring() check https://www.javatpoint.com/substring.

Edit:

If you want the first character before your substring to be removed too, you just need to say

loc = cleaned.indexOf(remove) - 1;

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

add a comment |

For example, with sentence="xR-MxR-MHelloxR-M" and remove="R-M" you would get:

cleaned = "xR-MxR-MHelloxR-M"

loc = 1

So the while-loop would go like this:

In words, your while loop removes every occurrence of the String remove out of the String sentence and saves the result in cleaned.

For substring() check https://www.javatpoint.com/substring.

Edit:

If you want the first character before your substring to be removed too, you just need to say

loc = cleaned.indexOf(remove) - 1;

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

add a comment |

For example, with sentence="xR-MxR-MHelloxR-M" and remove="R-M" you would get:

cleaned = "xR-MxR-MHelloxR-M"

loc = 1

So the while-loop would go like this:

In words, your while loop removes every occurrence of the String remove out of the String sentence and saves the result in cleaned.

For substring() check https://www.javatpoint.com/substring.

Edit:

If you want the first character before your substring to be removed too, you just need to say

loc = cleaned.indexOf(remove) - 1;

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

For example, with sentence="xR-MxR-MHelloxR-M" and remove="R-M" you would get:

cleaned = "xR-MxR-MHelloxR-M"

loc = 1

So the while-loop would go like this:

In words, your while loop removes every occurrence of the String remove out of the String sentence and saves the result in cleaned.

For substring() check https://www.javatpoint.com/substring.

Edit:

If you want the first character before your substring to be removed too, you just need to say

loc = cleaned.indexOf(remove) - 1;

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

edited Nov 17 '18 at 0:20

answered Nov 17 '18 at 0:12

Jere

531218

answered Nov 17 '18 at 0:12

Jere

531218

answered Nov 17 '18 at 0:12

Jere

531218

add a comment |

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