Regex to find String with square bracket and replace

my current Code is

`

String text= "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

String tag = "[School_Teacher_Name]";

String value= "Yash Mathur";

String str1 = tag.substring(1, tag.length()-1);

String reg = "/\["+str1+"\]/";



if(text.contains(tag)){

   return text.replaceAll(reg, value).trim();

}

else{

   return text;

}`

I dont have much experience in regex. my code is not replacing any value, Please help me out.

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

replace with what? the same string?

– GauravRai1512
Nov 15 '18 at 5:18

This is NOT JavaScript. This is Java. The two are completely different programming languages.

– VLAZ
Nov 15 '18 at 5:24

add a comment |

my current Code is

`

String text= "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

String tag = "[School_Teacher_Name]";

String value= "Yash Mathur";

String str1 = tag.substring(1, tag.length()-1);

String reg = "/\["+str1+"\]/";



if(text.contains(tag)){

   return text.replaceAll(reg, value).trim();

}

else{

   return text;

}`

I dont have much experience in regex. my code is not replacing any value, Please help me out.

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

replace with what? the same string?

– GauravRai1512
Nov 15 '18 at 5:18

This is NOT JavaScript. This is Java. The two are completely different programming languages.

– VLAZ
Nov 15 '18 at 5:24

add a comment |

my current Code is

`

String text= "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

String tag = "[School_Teacher_Name]";

String value= "Yash Mathur";

String str1 = tag.substring(1, tag.length()-1);

String reg = "/\["+str1+"\]/";



if(text.contains(tag)){

   return text.replaceAll(reg, value).trim();

}

else{

   return text;

}`

I dont have much experience in regex. my code is not replacing any value, Please help me out.

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

my current Code is

`

String text= "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

String tag = "[School_Teacher_Name]";

String value= "Yash Mathur";

String str1 = tag.substring(1, tag.length()-1);

String reg = "/\["+str1+"\]/";



if(text.contains(tag)){

   return text.replaceAll(reg, value).trim();

}

else{

   return text;

}`

I dont have much experience in regex. my code is not replacing any value, Please help me out.

java regex replace

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

edited Nov 15 '18 at 5:26

Abana Clara

1,646919

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

asked Nov 15 '18 at 5:16

SurendraKumar Jaiswal

10414

replace with what? the same string?

– GauravRai1512
Nov 15 '18 at 5:18

This is NOT JavaScript. This is Java. The two are completely different programming languages.

– VLAZ
Nov 15 '18 at 5:24

add a comment |

replace with what? the same string?

– GauravRai1512
Nov 15 '18 at 5:18

This is NOT JavaScript. This is Java. The two are completely different programming languages.

– VLAZ
Nov 15 '18 at 5:24

replace with what? the same string?

– GauravRai1512
Nov 15 '18 at 5:18

This is NOT JavaScript. This is Java. The two are completely different programming languages.

– VLAZ
Nov 15 '18 at 5:24

add a comment |

3 Answers
3

active

oldest

votes

If I don't misunderstood you requirements then you can do this way. Regex

Java

import java.util.regex.Matcher;

import java.util.regex.Pattern;



final String regex = "\[(School_Teacher_Name)]";

final String string = "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

final String subst = "Yash Mathur";



final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);

final Matcher matcher = pattern.matcher(string);



// The substituted value will be contained in the result variable

final String result = matcher.replaceAll(subst);



System.out.println("Substitution result: " + result);

Javascript

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

add a comment |

Remove forward slashes from your regex.

Change

String reg = "/\["+str1+"\]/";

String reg = "\["+str1+"\]";

Output

Yash Mathur is our new member, So please congratulate Yash Mathur .

PS - In this case it's better to use text.replace(tag, value) instead of text.replaceAll(reg, value)

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

add a comment |

It's far easier with Template Literals.

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

answered Nov 15 '18 at 5:22

Will

1,80411211

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

If I don't misunderstood you requirements then you can do this way. Regex

Java

import java.util.regex.Matcher;

import java.util.regex.Pattern;



final String regex = "\[(School_Teacher_Name)]";

final String string = "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

final String subst = "Yash Mathur";



final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);

final Matcher matcher = pattern.matcher(string);



// The substituted value will be contained in the result variable

final String result = matcher.replaceAll(subst);



System.out.println("Substitution result: " + result);

Javascript

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

add a comment |

If I don't misunderstood you requirements then you can do this way. Regex

Java

import java.util.regex.Matcher;

import java.util.regex.Pattern;



final String regex = "\[(School_Teacher_Name)]";

final String string = "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

final String subst = "Yash Mathur";



final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);

final Matcher matcher = pattern.matcher(string);



// The substituted value will be contained in the result variable

final String result = matcher.replaceAll(subst);



System.out.println("Substitution result: " + result);

Javascript

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

add a comment |

If I don't misunderstood you requirements then you can do this way. Regex

Java

import java.util.regex.Matcher;

import java.util.regex.Pattern;



final String regex = "\[(School_Teacher_Name)]";

final String string = "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

final String subst = "Yash Mathur";



final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);

final Matcher matcher = pattern.matcher(string);



// The substituted value will be contained in the result variable

final String result = matcher.replaceAll(subst);



System.out.println("Substitution result: " + result);

Javascript

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

If I don't misunderstood you requirements then you can do this way. Regex

Java

import java.util.regex.Matcher;

import java.util.regex.Pattern;



final String regex = "\[(School_Teacher_Name)]";

final String string = "[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .";

final String subst = "Yash Mathur";



final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);

final Matcher matcher = pattern.matcher(string);



// The substituted value will be contained in the result variable

final String result = matcher.replaceAll(subst);



System.out.println("Substitution result: " + result);

Javascript

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

const regex = /[(School_Teacher_Name)]/gm;

const str = `[School_Teacher_Name] is our new member, So please congratulate [School_Teacher_Name] .`;

const subst = `Yash Mathur`;



// The substituted value will be contained in the result variable

const result = str.replace(regex, subst);



console.log('Substitution result: ', result);

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

answered Nov 15 '18 at 5:22

Always Sunny

16.3k32847

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

add a comment |

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

Thanks allot, It worked, I do not require pattern and matcher, my String class method replaceAll takes regex.

– SurendraKumar Jaiswal
Nov 15 '18 at 5:35

@SurendraKumarJaiswal You're welcome, Glad it helps you somehow

– Always Sunny
Nov 15 '18 at 5:46

May I ask why at end "]", we didnot use "//]" ?

– SurendraKumar Jaiswal
Nov 15 '18 at 5:51

add a comment |

Remove forward slashes from your regex.

Change

String reg = "/\["+str1+"\]/";

String reg = "\["+str1+"\]";

Output

Yash Mathur is our new member, So please congratulate Yash Mathur .

PS - In this case it's better to use text.replace(tag, value) instead of text.replaceAll(reg, value)

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

add a comment |

Remove forward slashes from your regex.

Change

String reg = "/\["+str1+"\]/";

String reg = "\["+str1+"\]";

Output

Yash Mathur is our new member, So please congratulate Yash Mathur .

PS - In this case it's better to use text.replace(tag, value) instead of text.replaceAll(reg, value)

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

add a comment |

Remove forward slashes from your regex.

Change

String reg = "/\["+str1+"\]/";

String reg = "\["+str1+"\]";

Output

Yash Mathur is our new member, So please congratulate Yash Mathur .

PS - In this case it's better to use text.replace(tag, value) instead of text.replaceAll(reg, value)

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

Remove forward slashes from your regex.

Change

String reg = "/\["+str1+"\]/";

String reg = "\["+str1+"\]";

Output

Yash Mathur is our new member, So please congratulate Yash Mathur .

PS - In this case it's better to use text.replace(tag, value) instead of text.replaceAll(reg, value)

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

edited Nov 15 '18 at 5:29

answered Nov 15 '18 at 5:20

Kartik

3,85231435

answered Nov 15 '18 at 5:20

Kartik

3,85231435

answered Nov 15 '18 at 5:20

Kartik

3,85231435

add a comment |

It's far easier with Template Literals.

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

answered Nov 15 '18 at 5:22

Will

1,80411211

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

add a comment |

It's far easier with Template Literals.

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

answered Nov 15 '18 at 5:22

Will

1,80411211

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

add a comment |

It's far easier with Template Literals.

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

answered Nov 15 '18 at 5:22

Will

1,80411211

It's far easier with Template Literals.

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

let teacher = 'Yash Mathur';

let test = `${teacher} is our new member, so please congratulate ${teacher}.`;



console.log(test);

answered Nov 15 '18 at 5:22

Will

1,80411211

answered Nov 15 '18 at 5:22

Will

1,80411211

answered Nov 15 '18 at 5:22

Will

1,80411211

answered Nov 15 '18 at 5:22

Will

1,80411211

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

add a comment |

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

OP used the wrong tag. It's not javascript

– Abana Clara
Nov 15 '18 at 5:23

Well, then I guess use replace :)

– Will
Nov 15 '18 at 5:27

add a comment |

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