There are multiple ways to check if an enum contains the given string value in Java. You can use the valueOf() to convert the string into an enum value in Java. If the string is a valid enum value, the valueOf()
One of the most common tasks in Java or any other programming language is to check whether a string contains another string or not. Java provides multiple ways to accomplish this task. You can use contains(), indexOf(), lastIndexOf(), startsWith(), and endsWith() methods to check if ...
}/** * 获取 value */publicStringgetValue(){returnthis.value; }/** * 获取变量名列表 */publicstaticMyEnums[] getVariables(){returnvalues(); }/** * 根据code获取value */publicstaticStringgetValue(intcode){for(MyEnums myEnums:values()){if(code==myEnums.code){returnmyEnums.value; }...
}for(ErrorCodeEnum item : ErrorCodeEnum.values()) {if(StringUtils.equals(item.getCode(), code)) {returnitem; } }returnnull; }} 我们看到ErrorCodeEnum具有属性String code和String desc,并且具有一个私有的构造函数。原因是我们的枚举常量需要使用这个私有的构造函数的定义:SYSTEM_ERROR("system_error", ...
String Class enum Annotation 以上类型的数组 如果你使用了其他类型,编译器就会报错。注意,也不允许使用任何包装类型,但是由于自动装箱的存在,这不算是什么限制。注解也可以作为元素的类型。稍后你会看到,注解嵌套是一个非常有用的技巧。 默认值限制 编译器对于元素的默认值有些过于挑剔。首先,元素不能有不确定的值...
So next, let’s add two“find”methods in ourWeekday enum: enum Weekday { Mon("Monday"), ... static Optional<Weekday> byNameIgnoreCase(String givenName) { return Arrays.stream(values()).filter(it -> it.name().equalsIgnoreCase(givenName)).findAny(); ...
publicclassEnumDemo{publicstaticvoidmain(String[]args){//创建枚举数组Day[]days=newDay[]{Day.MONDAY,Day.TUESDAY,Day.WEDNESDAY,Day.THURSDAY,Day.FRIDAY,Day.SATURDAY,Day.SUNDAY};for(inti=0;i<days.length;i++){System.out.println("day["+i+"].ordinal():"+days[i].ordinal());}System.out.pri...
{private String name = "init";private int age;public User() {}public User(String name, int age) {super();this.name = name;this.age = age;}private String getName() {return name;}private void setName(String name) {this.name = name;}public int getAge() {return age;}public void ...
* default implementation of this method searches for classes in the * following order: * * * * Invoke {@link #findLoadedClass(String)} to check if the class * has already been loaded. * * Invoke the {@link #loadClass(String) loadClass} method * on the parent class loader. If...
我们自定义的枚举类都是继承自java.lang.Enum,拥有一下实例中的功能: 复制代码 //: enumerated/EnumClass.java // Capabilities of the Enum class import static net.mindview.util.Print.*; enum Shrubbery { GROUND, CRAWLING, HANGING } public class EnumClass { public static void main(String[] args...