Java 中的孤立大小写错误
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Orphaned Case Error in Java
提问by Aryan Srivastava
Im a beginner in the coding world. I have been learning Java recently when i came across a speedbump.
我是编码世界的初学者。我最近在学习 Java 时遇到了一个障碍。
First of all heres the code :
首先是代码：
import java.util.*;
public class Stuff {
public static void main(String []args); {
Scanner identity = new Scanner(System.in);
String id;
System.out.println("Please Enter Your Name :");
id = identity.next();
Switch (id); {
case "name1":
//some code here....
break;
case "name2":
//some code here....
break;
case "name3":
//some code here....
break;
case "name4":
//some code here....
break;
default :
//some code here....
break;
}
}
}
The error
错误
Error: Orphaned case
case: "name1";
I cant seem to find why this is happening and have googles to no avail.
我似乎无法找到为什么会发生这种情况并且谷歌无济于事。
Edit : Some people have said that I am ending Switch early with the semi colon. But when i add it, i get a new error along with the previous one:
编辑：有些人说我会用分号提前结束 Switch。但是当我添加它时，除了上一个错误之外，我还会收到一个新错误：
Error: ';' expected
Switch (id) {
^
采纳答案by Suresh Atta
You ran into multiple problems here.
您在这里遇到了多个问题。
Problem 1 :
问题1：
Switch (id); {
----------^
Look carefully your ;ends your switchthere right away.
仔细看看你的;结局switch马上就到了。
Apparently all your casestatements became orphans :)
显然你所有的case陈述都变成了孤儿:)
Problem 2 :
问题2：
Your Switchshould be switch(lower case s)
你Switch应该是switch（小写s）
Problem 3 :
问题 3：
One more ;cause you compile time error at the line
另一个;原因是您在该行编译时出错
public static void main(String []args); {
-----^
Note: I strongly suggest you to use an IDE, to save lot of time here. It tells you the compiler errors on the fly.
注意：我强烈建议您使用 IDE，以节省大量时间。它会即时告诉您编译器错误。
回答by James Wierzba
Your syntax for the switch statement is wrong.
您的 switch 语句语法错误。
switch (id) {
case "name1":
//some code here....
break;
case "name2":
//some code here....
break;
case "name3":
//some code here....
break;
case "name4":
//some code here....
break;
default :
//some code here....
break;
}
回答by Kumar Abhinav
The semicolon after the Switch (id);statement effectively terminates the switch case and the cases you define afterwards are orphan(i.e. without any switch case)
语句后面的分号Switch (id);有效地终止了 switch case，之后你定义的 case 是孤立的（即没有任何 switch case）
回答by Marged
What you try will need a quite current version of Java because you use Strings with switch.
您尝试的操作将需要最新版本的 Java，因为您将Strings 与switch.
And you have to
你必须
switch (id)
So please remove the ;
所以请删除 ;
回答by Thomas Jungblut
You are finishing the switch statement early:
您正在提前完成 switch 语句：
Switch (id); {
The real syntax is:
真正的语法是：
switch (id) {
// your cases
}
