package String_test; public class test_1 { public static void main(String[] args) { String str1 = "HelloWorld"; String str2 = "HelloWorld"; String str3 = new String("HelloWorld"); String str4 = "Hello"; String str5 = "World"; String str6 = "Hello" + "World"; String str7 = str4 + str5; System.out.println("str1 == str2 result: " + (str1 == str2)); //1. true System.out.println("str1 == str3 result: " + (str1 == str3)); //2. false System.out.println("str1 == str6 result: " + (str1 == str6)); //3. true System.out.println("str1 == str7 result: " + (str1 == str7)); //4. false System.out.println("str1 == str7.intern() result: " + (str1 == str7.intern())); //5. true System.out.println("str3 == str3.intern() result: " + (str3 == str3.intern())); //6.false } }