Remove characters from a String in Java

Question

I am trying to remove the  xml part of a file name with the following code   String id   fileR getName                  id replace   xml                      idList add id     The problem is that it is not removing it and I have no clue why it won t remove the target text    EDIT  Actually I realize that the replace function won t find the  xml  so I guess the question is  how do I get rid of those last 4 characters    Here is the string that is being passed in   0b14d501a594442a01c6859541bcb3e8164d183d32937b851835442f69d5c94e xml  Thanks

User · Answer

This will safely remove only if token is at end of string   StringUtils removeEnd string    xml         Apache StringUtils functions are null-  empty-  and no match- safe

User · Answer

String id   id substring 0 id length  -4

User · Answer

Kotlin Solution  Kotlin has a built-in function for this  removeSuffix  Documentation   var text    filename xml  text   text removeSuffix   xml       filename    If the suffix does not exist in the string  it just returns the original  var text    not a filename  text   text removeSuffix   xml       not a filename    You can also check out removePrefix and removeSurrounding which are similar

User · Answer

Strings in java are immutable   That means you need to create a new string or overwrite your old string to achieve the desired affect   id   id replace   xml

User · Answer

Java strings are immutable  But you has many options   You can use    The StringBuilder class instead  so you can remove everything you want and control your string   The replace method   And you can actually use a loop

User · Answer

Strings are immutable  so when you manipulate them you need to assign the result to a string   String id   fileR getName    id   id replace   xml           this is the key line idList add id

User · Answer

Strings are immutable   Therefore String replace   does not modify id  it returns a new String with the appropriate value   Therefore you want to use id   id replace   xml

User · Answer

Can t you use  id   id substring 0  id length  -4     And what Eric said  ofcourse

[java] Remove characters from a String in Java

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