java - 我收到错误 : class, 接口(interface)或预期的枚举，但我无法弄清楚

Question

我已经为此工作了三天，但我无法解决任何问题。请帮忙!

public static void displayType (String ntype)
   {
       switch (ntype)

           case "African":
           System.out.print ("This Elephant is African")
           break;

           case "Indian":
           System.out.print ("This Elephant is Indian")
           break;

           default :
           System.out.print ("This type of Elephant is invalid")

           return ntype;
     } //End Switch


  } 

这些是我收到的错误:

Lab2Unit4Psuedocode.java:108: error: class, interface, or enum expected
 public static void displayType (String ntype)
               ^

Lab2Unit4Psuedocode.java:116: error: class, interface, or enum expected
               case "Indian":
               ^

Lab2Unit4Psuedocode.java:120: error: class, interface, or enum expected
               default :
                       ^

Lab2Unit4Psuedocode.java:124: error: class, interface, or enum expected
         } //End Switch
         ^
4 errors

Answer 1

请查看下面代码中的注释。

public class Lab2Unit4Psuedocode {

   public static void displayType (String ntype) {
       switch (ntype) { //you need the open curly brace
           case "African":
                System.out.println("This Elephant is African"); //<-- you need to terminate with semi-colons in Java
                break;

           case "Indian":
                System.out.println("This Elephant is Indian");
                break;

           default:
                System.out.println("This type of Elephant is invalid");
                //some people add an explicit break here
         //don't return anything.  By definition, void means you return nothing.
       }
   }
} //always line up your curly braces

另请注意，在 String 数据类型上使用 switch 仅出现在 Java 7 中。所以这不适用于旧版本的 Java。

Java 需要大量练习 - 坚持下去!