Как сравнить две строки в java

String str1 = "Java";
 String str2 = "Java";
 String str3 = "C++";


 if (str1.equals(str2)) {
     System.out.println("Statement is true");
 } else {
     System.out.println("Statement is false");
 }
 // => Statement is true

 if(str1.equals(str3)) {
     System.out.println("Statement is true");
 } else {
     System.out.println("Statement is false");
 }
 // => Statement is false