most important string methods? code example

Example 1: string method example in java

public char charAt(int index)
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String x = "airplane";
System.out.println( x.charAt(2) ); // output is 'r'

Example 2: string method example in java

public String trim()

String x = " hi ";
System.out.println( x + "x" ); // result is" hi x"
System.out.println(x.trim() + "x"); // result is "hix"