Something about enum in Java

Here is a CA enum class:

public enum CA{
	HH,BB,DD;
	public String getString(){
		switch(this){ case HH:return "HH hello"; case BB:return "BB hello"; case DD:return "DD hello"; default:return "Hello world" }
	}
}

  
 

  
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We have another class B:

public class B{
	public CA yc;
}

  
 

  
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I want to show some usages of enum class:

String jsonS = "{"+"\"yc\":\"DD\""+"}";
B b = new Gson().fromJson(jsonS,B.class);
System.out.println(b.getStrting());

  
 

  
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The output is the following:

DD hello

  
 

  
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We can use the String enum to initialize the enum object:

CA bb = CA.valueOf("BB");
System.out.println(bb.getString());

  
 

  
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the result:

BB hello

  
 

  
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The enum class is like a normal class. It can has behaviors as the normal class own.

文章来源: blog.csdn.net，作者：WongKyunban，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/weixin_40763897/article/details/114467005