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public String substring(int beginIndex, int endIndex)

A substring will be returned, and the first index of this substring will be beginIndex, and the last index will be endIndex.

The length of this substring will be endIndex-beginIndex.

This explanation will be a bit abstract, so I will illustrate it with an example.

public String substring(int beginIndex)

A substring will be returned starting from beginIndex and ending at the last letter of the String. The end position cannot be customized.

This explanation will be a bit abstract, so I will illustrate it with an example.

example:

 public class SubStringTest {
    public static void main(String args[]) {
        String Str = new String("uppengarden.com");
 
        System.out.print("Return value:" );
        System.out.println(Str.substring(4) );
//return value: engarden.com
 
        System.out.print("Return value:" );
        System.out.println(Str.substring(4, 10) );
//return value: engard

		System.out.print("Return value:" );
        System.out.println("uppengarden.com".substring(4, 10) );
//return value: engard

    }
}

explain:

substring(int beginIndex, int endIndex)

There are two main parameters as follows:

beginIndex – the starting position, including the current index.

endIndex – the position of the end, excluding the current index.

There will be a chance of the following Error Exception:

IndexOutOfBoundsException

• starting index is negative
• The index at the end is greater than the length of the String
• The starting index is greater than the ending index