how to compare strings java

1System.out.println("hey".equals("hey")); //prints true
2
3/*
4	always use .equals() instead of ==,
5    because == does the compare the string content but
6    loosely where the string is stored in.
7*/

1// compare two strings in java using String.equals() method in java
2public class EqualsMethodDemo
3{
4   public static void main(String[] args)
5   {
6      String str1 = new String("HelloWorld");
7      String str2 = new String("Flower");
8      String str3 = new String("Hello");
9      String str4 = new String("Hello");
10      String str5 = new String("hello");
11      // compare str1 != str2
12      System.out.println("Compare " + str1 + " and " + str2 + ": " + str1.equals(str2));
13      // compare str3 = str4
14      System.out.println("Compare " + str3 + " and " + str4 + ": " + str3.equals(str4));
15      // compare str4 != str5
16      System.out.println("Compare " + str4 + " and " + str5 + ": " + str4.equals(str5));
17      // compare str1 != str4
18      System.out.println("Compare " + str1 + " and " + str4 + ": " + str1.equals(str4));
19   }
20}

1******Java String compareTo()******
2
3  The Java String class compareTo() method compares the given 
4  string with the current string lexicographically. 
5  It returns a positive number, negative number, or 0.
6  ___________________________________________
7  	if s1 > s2, it returns positive number  
8	if s1 < s2, it returns negative number  
9	if s1 == s2, it returns 0  
10  ___________________________________________
11  
12  

1if (aName.equals(anotherName))
2        { 
3            System.out.println(aName + " equals " + anotherName);
4        }
5        else 
6            { 
7                System.out.println(aName + " does not equal " +anotherName );
8                           
9            }

1// These two have the same value
2new String("test").equals("test") // --> true 
3
4// ... but they are not the same object
5new String("test") == "test" // --> false 
6
7// ... neither are these
8new String("test") == new String("test") // --> false 
9

1class scratch{
2    public static void main(String[] args) {
3        String str1 = "Nyello";
4        String str2 = "Hello";
5        String str3 = "Hello";
6
7        System.out.println( str1.equals(str2) ); //prints false
8        System.out.println( str2.equals(str3) ); //prints true
9    }
10}