CODEWITHSUNDEEP
javastring
vijayk
vijayk

Reputation: 2753

How to replace a String from another String?

I want to remove some String from my original path, but I cant replace the another string from my original String

This is my code 

String path="contentPath =C/Users/consultant.swapnilb/Desktop/swapnil=Z:/Build6.0/Digischool/";
String a=path.substring(path.lastIndexOf("="), path.length());
path.replace(a, "");
System.out.println("a---"+a);
System.out.println("path---"+path);

I just want to remove =Z:/Build6.0/Digischool/ from my original path.

Upvotes: 2

Views: 176

Answers (4)

nikhilgupta86
nikhilgupta86

Reputation: 492

String is a immutable class(Due to security reasons) you can not assign any other value to it once it is initialized. You have to assign the substring to some other string object and then access it. Just change your code as shown below it will work.

String path="contentPath =C/Users/consultant.swapnilb/Desktop/swapnil=Z:/Build6.0/Digischool/";
String a=path.substring(path.lastIndexOf("="), path.length());
    String b = path.replace(a, "");
    System.out.println("a---"+a);
    System.out.println("path---"+path);
    System.out.println(b);

Upvotes: 0

Rohit Jain
Rohit Jain

Reputation: 213203

First of all, since Strings are immutable in Java, you have to re-assign the changes in a String to another reference:

path = path.replace(a, "");

Secondly, you are doing extra job out there. You can replace these lines:

String a=path.substring(path.lastIndexOf("="), path.length());
path.replace(a, "");

with:

path = path.substring(0, path.lastIndexOf("="));

Upvotes: 4

Salah
Salah

Reputation: 8657

what all you need to do is 

String a=path.substring(0, path.lastIndexOf("="));

Upvotes: 4

Maroun
Maroun

Reputation: 95948

See String#replace:

public String replace(CharSequence target, CharSequence replacement)
       ↑

It returns a new object of type String, you should assign the result:

path = path.replace(a, "");

However, you can simply do:

path = path.substring(0, path.lastIndexOf("="));

Upvotes: 5

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