java string to lower case

1string.toLowerCase();  

1"Hello World".toLowerCase()

1String s1 = "JAVATPOINT HELLO stRIng";  
2String s1lower = s1.toLowerCase(); // s1lower = "javatpoint hello string" 

1// check lowercase or not in java..
2
3public class Test {
4
5   public static void main(String args[]) {
6      System.out.println(Character.isLowerCase('c')); //true
7      System.out.println(Character.isLowerCase('C')); //false
8      System.out.println(Character.isLowerCase('\n')); //false
9      System.out.println(Character.isLowerCase('\t')); //false
10   }
11}