以String类型为例:
String s1 = "ABC"; String s2 = "ABC"; String s3 = new String("ABC"); String s4 = new String("ABC");
System.out.println(s1.equals(s2));
System.out.println(s1.equals(s3));
System.out.println(s1.equals(s4));
System.out.println(s3.equals(s4));
System.out.println(s1 == s2);
System.out.println(s1 == s3);
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原文:http://www.cnblogs.com/zyxiaohuihui/p/4945903.html