Question

JDK编译器说它可以编译，但是在运行时出现此错误：

静态错误：此类没有接受String []的静态void main方法。

我习惯于将方法类放在一个文件中，而将主类放在一个单独的文件中。

我该如何解决这个问题？

    import java.util.Scanner;

public class Test{
  private final int classSize = 35;
  private int numEnrolled, numNeeded; 

  public void Input(){
   Scanner in = new Scanner(System.in);
   System.out.println("Enter the amount enrolled in your class");
   numEnrolled = in.nextInt();
   System.out.println("Your input is " + numEnrolled);       

   // Other parts of code that needs to be coded 
  }
}

class testRunner{
  static void main(String args[]){
    Test newTest = new Test();
    newTest.Input();

 }}

Answer 1

在一个文件中，您只能有一个公共课程，并且可以有多个非公开类
您的文件名必须与唯一的公开文件匹配类别
要使您的类可运行，它应包含一个 公共静态变量 void main（String args []） 方法，最好在公共类中使用

您的TestRunner.java应该看起来像这样

class Test{
    private final int classSize = 35;
    private int numEnrolled, numNeeded;

    public void Input(){
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the amount enrolled in your class");
        numEnrolled = in.nextInt();
        System.out.println("Your input is " + numEnrolled);

        // Other parts of code that needs to be coded
    }
}

public class TestRunner{
    public static void main(String args[]){
        Test newTest = new Test();
        newTest.Input();

    }}

编辑：如果要保留文件名Test.java，这也可以：

public class Test {
    private final int classSize = 35;
    private int numEnrolled, numNeeded;

    public void Input() {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the amount enrolled in your class");
        numEnrolled = in.nextInt();
        System.out.println("Your input is " + numEnrolled);

        // Other parts of code that needs to be coded
    }
}

class TestRunner {
    public static void main(String args[]) {
        Test newTest = new Test();
        newTest.Input();

    }
}

Answer 2

更改：

class testRunner{
  static void main(String args[]){
    Test newTest = new Test();
    newTest.Input();

 }}

收件人：

public class testRunner {
  public static void main(String args[]) {
    Test newTest = new Test();
    newTest.Input();
}}

main()必须始终声明为 public

Java博士中的多个类

2 个答案: