Methods on String Object in Java

We have below list of methods available on String object in java.


public class StringMethodsTest {

    public static void main(String[] args) {
        String test="java";
        //charAt()
        System.out.println(test.charAt(0));//index will start with zero
        //concat()
        test.concat("program");
        System.out.println(test);//will print java becasue we just concatinated but did not assign to string
        String testcon = test.concat("program");
        System.out.println(testcon);
        //contains
        System.out.println(test.contains("j"));//return true if string contains char j any where//trur
        System.out.println(test.contains("jv"));//return true if string contains char j any where//false
        //ends with
        System.out.println(test.endsWith("a"));//return true if specified string is ends with mentioed suffix//true
        System.out.println(test.endsWith("aj"));//return true if specified string is ends with mentioed suffix//false
        //equals
        String test1 = "java";
        System.out.println(test.equals(test1));//will check only text here//true
        //compareTo
        //ifs1==s2, then 0 or if s1>s2 then +ve or if s1 <s2, then -ve values will print
        String test3 = "sql";
        String test4 = "c++";
        String test5 = "jquery";
        System.out.println(test.compareTo(test3));//-ve value-9 --diffrence between first characters
        System.out.println(test.compareTo(test4));//+ve value 2--diffrence between first characters
        System.out.println(test.compareTo(test1));//here 0
        System.out.println(test.compareTo(test5));//here -ve -16 becasue second character is different
        //equalIgnorecase
        String test6 = "JAVA";
        System.out.println(test.equalsIgnoreCase(test6));//ignore case sensitive//true
        System.out.println(test.equals(test6));//not case sensitive//false
    }

}

Will continue other methods in next post.