//使用 + 拼接String expletive="Expletive"; String PC13="deleted"; String message=expletive + PC13;//如果其中有数字那么会将数字转为String再拼接 //如果是多个字符串拼接还可以使用joinStringa="a";Stringb="b";Stringc=String.join(a,b,"c","de"); 注:Java的String并不是C++里的char[]而是char*...
RED("红色",1), GREEN("绿色",2), BLANK("白色",3), YELLO("黄色",4);// 成员变量privateString name;privateintindex;// 构造方法privateColor(String name,intindex){this.name = name;this.index = index; }// 普通方法publicstaticStringgetName(intindex){for(Color c : Color.values()) {if(...
final String TYPO_FRI = "ffri"; final String TYPO_FRIDAY = "ffriday"; After we understand how to compare aStringand anenuminstance, we’ll also discuss the common use case of these comparisons. So next, let’s see them in action. 3. Comparing a GivenStringto anenumInstance’s Name ...
Methods inherited from class java.lang.Object getClass,notify,notifyAll,wait,wait,wait Constructor Detail Enum protected Enum(Stringname, int ordinal) Sole constructor. Programmers cannot invoke this constructor. It is for use by code emitted by the compiler in response to enum type declarations. ...
// 定义publicenumColor{BLACK,WHITE}// 使用publicclassMain{publicstaticvoidmain(String[]args){System.out.println(Color.BLACK);}}// 结果// BLACK 这样只是能够知道枚举简单的使用方法,不能看出枚举的特点和枚举的具体实现. 下面我们通过jad工具来反编译Color类, 通过jad -sjava Color.class反编译出一份java...
所有的枚举都继承自java.lang.Enum类。由于Java 不支持多继承,所以枚举对象不能再继承其他类。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicinterfaceBehaviour{voidprint();StringgetInfo();}publicenumColorimplementsBehaviour{RED("红色",1),GREEN("绿色",2),BLANK("白色",3),YELLO("黄色",4...
如果打算自定义自己的方法,那么必须在enum实例序列的最后添加一个分号。而且 Java 要求必须先定义 enum 实例。 public enum Color { RED("红色 ", 1), GREEN("绿色 ", 2), BLANK("白色 ", 3), YELLO("黄色 ", 4); // 成员变量 private String name; ...
/** * @Author: JCccc * @Description: 将枚举转换为list类型 * @Date: Create in 19:03 2021/1/26 */ public class EnumListUtil { private static String ENUM_CLASSPATH="java.lang.Enum"; public static List<Map<String, Object>> enumToListMap(Class<?> enumClass) { List<Map<String, Object...
packagecom.lxk.enumTest;/*** Java枚举用法测试* * Created by lxk on 2016/12/15*/publicclassEnumTest{publicstaticvoidmain(String[]args){forEnum();useEnumInJava();}/*** 循环枚举,输出ordinal属性;若枚举有内部属性,则也输出。(说的就是我定义的TYPE类型的枚举的typeName属性)*/privatestaticvoidfor...
import java.util.*;public class Test {public static void main(String[] args) {Scanner in = new Scanner(System.in);System.out.println("请输入你心中的数字：");int sex = in.nextInt();if (sex == 1) {System.out.println("你出的是石头");return;}if (sex == 2) {System....