java - 启动 Java (Eclypse) 时出现奇怪错误

Question

我阅读了有关此问题的讨论，但找不到解决方案!

我编写了一个非常简单的程序，但是当我启动它时，出现此错误:

           << Selection does not contain a main type >>

预先非常感谢您对我的帮助。我是 Java 新手:/

<小时/>

public class Implementation{

  public static void Main(String args[]){

    Operations_numbers operations;
    operations = new Operations_numbers();

    int subtraction = operations.subtraction(10,2);
    String result_Comparison = new String();
    result_Comparison = operations.comparison(8,3);

    System.out.println(result_Comparison); 
    System.out.println(subtraction); 

  }

}
---------------
public class Operations_numbers{

  public int subtraction (int x, int y){
    int subtraction;
    subtraction=x-y; 
    return subtraction;
  }

  public String comparison (int x, int y){    
    if(x>y){    
      String result="the number" + x + "is bigger than the number" + y;
      return result;
    }    
    else{  
      String result="the number" + y + "is bigger than the numbero" + x;
      return result;
    }
  }

}

Answer 1

main 应为小写。正确的签名是

public static void main(String args[])