substring (int beginIndex, int endIndex)

public String substring(int beginIndex, int endIndex)

Returns a string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex.

class StringSubString1{
 public static void main(String args[]){
  String str = "Self Learning Java";
  String str1 = str.substring(0, 5);
  String str2 = str.substring(5, 14);
  String str3 = str.substring(14, 18);
  
  System.out.println("str = " + str);
  System.out.println("str1 = " + str1);
  System.out.println("str2 = " + str2);
  System.out.println("str3 = " + str3);
 }
}

Output

str = Self Learning Java
str1 = Self
str2 = Learning
str3 = Java

1. Throws IndexOutOfBoundsException, if the beginIndex is negative, or endIndex is larger than the length of this String object, or beginIndex is larger than endIndex.

class StringSubString1IndexOut{
 public static void main(String args[]){
  String str = "Self Learning Java";
  String str1 = str.substring(6, 5);
  
  System.out.println("str = " + str);
  System.out.println("str1 = " + str1);
 }
}

Output

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1954)
        at StringSubString1IndexOut.main(StringSubString1IndexOut.java:4)

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