how to remove part of a string from the end of a string in java code example

Example 1: delete ending part of the string java

//To delete starting from "opened"
String str ="13 opened by someone";

String result = str.substring(0,str.lastIndexOf(" opened"));

Example 2: remove part of string java

// Works only if you have a certain character at which you want to cut
String text = "Image.png";

String[] cutText = text.split("\\.");

// cutText[0] has value "Image"
// cutText[1] has value "png"