String a="hello",b="hello";
System.out.println(a);
System.out.println(b);
if(a==b)System.out.println("相等\n");
a="hi";
System.out.println(a);
System.out.println(b);
if(a==b)System.out.println("相等\n");
else System.out.println("不相等\n");
//keyboard.close();
String c= new String("你好");
String d = new String("你好");
System.out.println(c);
System.out.println(d);
if(c==d)System.out.println("相等");
else System.out.println("不相等\n");
System.out.println(c);
System.out.println(d);
if(c.equals(d))System.out.println("值相等\n");
else System.out.println("值不相等\n");
String e = new String("吃饭了吗");
String f = new String(e);
System.out.println(e);
System.out.println(f);
if(e==f)System.out.println("相等\n");
else System.out.println("不相等\n");
System.out.println(e);
System.out.println(f);
if(e.equals(f))System.out.println("值相等\n");
else System.out.println("值不相等\n");
String g = new String("嗨");
String h = g;
System.out.println(g);
System.out.println(h);
if(g==h)System.out.println("相等\n");
else System.out.println("不相等\n");
System.out.println(g);
System.out.println(h);
if(g.equals(h))System.out.println("值相等\n");
else System.out.println("值不相等\n");
g = "你好";
System.out.println(g);
System.out.println(h);
if(g==h)System.out.println("相等\n");
else System.out.println("不相等\n");
g=new String("嗨");
System.out.println(g);
System.out.println(h);
if(g==h)System.out.println("相等\n");
else System.out.println("不相等\n");
