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public String trim()

public class Test {
    public static void main(String args[]) {
        String Str = new String("    www.tutorialpro.org    ");
        System.out.print("Original value :" );
        System.out.println( Str );

        System.out.print("After trimming :" );
        System.out.println( Str.trim() );
    }
}

Original value :    www.tutorialpro.org    
After trimming :www.tutorialpro.org