enum Week1{ Monday("星期一"),Tuesday("星期二"),Wednesday("星期三"),Thursday("星期四"),Friday("星期五"),Saturday("星期六"),Sunday("星期日"); private String name; Week1(String name){ this.name = name; } public String toString() { return this.name(); } } public class t2 { public static void main(String[] args) { Week1 wk1 = Week1.Monday; System.out.println("x="+wk1); Week1 wk2 = Week1.valueOf("Tuesday"); System.out.println("Week.valueOf(\"Tuesday\")"+"="+wk2); System.out.println("Week枚举类型的所有取值为："); for(Week1 wk:Week1.values()) { System.out.println(wk); } } }

这段代码的问题在于，类名和代码中引用的枚举类型名称不一致。

具体来说，枚举类型定义为 Week1，但是在 t2 类中引用时却使用了 Week。所以在 t2 类中，需要将代码中的所有 "Week" 替换为 "Week1"，包括 System.out.println("Week.valueOf(\"Tuesday\")"+"="+wk2); 和 for(Week1 wk:Week1.values())。

修改后的代码如下所示：

enum Week1{ 
    Monday("星期一"),Tuesday("星期二"),Wednesday("星期三"),Thursday("星期四"),Friday("星期五"),Saturday("星期六"),Sunday("星期日"); 
    private String name;    
    Week1(String name){ 	
        this.name = name; 
    }   
    public String toString() { 	
        return this.name(); 
    } 
}

public class t2 { 
    public static void main(String[] args) { 		
        Week1 wk1 = Week1.Monday; 		
        System.out.println("x="+wk1); 		
        Week1 wk2 = Week1.valueOf("Tuesday"); 		
        System.out.println("Week1.valueOf(\"Tuesday\")"+"="+wk2); 		
        System.out.println("Week1枚举类型的所有取值为："); 		
        for(Week1 wk:Week1.values()) { 			
            System.out.println(wk); 		
        }  	
    } 
}

修改后的代码可以正常编译运行，并输出如下结果：

x=Monday
Week1.valueOf("Tuesday")=Tuesday
Week1枚举类型的所有取值为：
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday