Java program to find the index of a specified character in a string using indexOf() method

PROGRAM:

public class IndexOfExample {
    public static void main(String [] args){
        String s1= new String("Welcome to Java Programming");
        String s2= new String("Java");
        String s3= new String("Programming");
        String s4= new String("hello");
        System.out.println("Index of J in s1 is "+s1.indexOf('J'));
        System.out.println("Index of a in s1 is "+s1.indexOf('a'));
        System.out.println("Index of a in s1 after 15th char is "+s1.indexOf('a',15));
        System.out.println("Index of string s2 in s1 is "+s1.indexOf(s2));
        System.out.println("Index of string s3 in s1 is "+s1.indexOf(s3));
        System.out.println("Index of string s4 in s1 is "+s1.indexOf(s4));
        //-1 is printed since s4 is not present in s1
        System.out.println("Index of string 'to' in s1 is "+s1.indexOf("to"));
    }

}

OUTPUT:

Index of J in s1 is 11
Index of a in s1 is 12
Index of a in s1 after 15th char is 21
Index of string s2 in s1 is 11
Index of string s3 in s1 is 16
Index of string s4 in s1 is -1
Index of string 'to' in s1 is 8