理解String.intern()

直接上代码，一个很小的知识点。

String s1 = "i love baojiao";
String s2 = s1;
String s3 = new String("i love baojiao");
String s4 = s3.intern();
System.out.println(s1 == s2);
System.out.println(s1 == s3);
System.out.println(s1 == s4);

结果为

• true
• false
• true

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