substring()

substring() — Extracts a portion of the string based on the specified starting index and (optionally) ending index. 

String substring(int startIndex)
String substring(int startIndex, int endIndex)
Syntax. 
String text = "Hello, World!";
String part = text.substring(7); // Outputs "World!"
String specificPart = text.substring(0, 5); // Outputs "Hello"
Example.

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substring()

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Java Data Types