java找不着符号_找不到符号：Java
如果这是一个怪异的问题，我感到很抱歉，但是我刚刚开始OOP，并遇到了一个我应该制作的简单菜单驱动数学程序。我清除了编译器给我的所有错误，但是现在它给了我大约14个新错误，其中大多数被描述为“找不到符号”。这是我的代码：
import java.util.Scanner;
public class MathMenu
{
//MENU METHOD
private static void menu(String args[])
{
int choice;
System.out.printf("Enter '1' to add");
System.out.printf("Enter '2' to subtract");
System.out.printf("Enter '3' to exit");
System.out.printf("\nPlease enter your choice: ");
choice=input.nextInt();
if (choice==1)
sum(n,m);
if (choice==2)
dif(n,m);
else if(choice==3)
return;
}
//SUM
private static int sum(int a, int b)
{
return n+m;
}
//DIFFERENCE
private static int dif(int a, int b)
{
if(n
return m-n;
else
return n-m;
}
public static void main(String args[])
{
int n=15;
int m=8;
Scanner input = new Scanner(System.in);
menu();
}
}
这是新的编译器输出：
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Shahraiz Tabassam>cd c:\java\bin
c:\java\bin>javac MathMenu.java
MathMenu.java:7: error: no suitable constructor found for Scanner()
private static Scanner input = new Scanner();
^
constructor Scanner.Scanner(ReadableByteChannel,String) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(ReadableByteChannel) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(String) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(Path,Charset) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(Path,String) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(Path) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(File,CharsetDecoder) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(File,String) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(File) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(InputStream,String) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(InputStream) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(Readable) is not applicable
(actual and formal argument lists differ in length)
constructor Scanner.Scanner(Readable,Pattern) is not applicable
(actual and formal argument lists differ in length)
MathMenu.java:64: error: method menu in class MathMenu cannot be applied to give
n types;
menu();
^
required: String[]
found: no arguments
reason: actual and formal argument lists differ in length
2 errors
c:\java\bin>
本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！