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Parsing of string class intern() method

2022-04-23 05:23:00 【Cx_ Xuan】

String class intern() Method

string.intern() The method is to return a string back , The returned string is the string that calls this method .

eg:"CX".intern();------ Back to you CX This string .

What's the use of this ？

--------------------

String call intern When the method is used , It will check whether there is this string in the string constant pool , If so, point the reference of this string to it . Otherwise, add the string to the constant pool and return its reference .

Example ：

public static void main(String[] args) {
		String a = new String("Cx");
		String b = new String("Cx");
		String c = "Cx";
		System.out.println(a==b);//--false
		System.out.println(a==c);//--false
		System.out.println(a.intern()==b);//false
		System.out.println(a.intern()==c);//true
		System.out.println(a.intern()==b.intern());//true
	}

The results have been given .

== Is to determine whether their references point to the same address . If so true.

JAVA Basics It will be updated slowly . It's all personal understanding . I hope you can point out the mistakes .

Thanks!

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