Java的equals和==

 

具体说明就算了，看看实例了解：

 

       String one = "tt";
       String two = "tt";
       
       System.out.println(one.equals(two));
       System.out.println(one.equals("tt"));
       
       String three = "t";
       System.out.println(one.equals(three + three));
       
       String four = new String();
       four = "tt";
       System.out.println(one.equals(four));
       
      System.out.println(one == two);
      System.out.println(one == "tt");
      System.out.println(one == (three+three));
      System.out.println(one == four);

 

true
true
true
true
true
true
false
true