导出的可运行Java程序不适用于main方法

时间:2018-06-14 02:40:08

标签: java eclipse main-method

我在我的Java练习书中创建了一个小游戏,当我在Eclipse中编译它运行正常时,但是一旦我添加main方法并将其作为.jar导出到我的桌面上,当我双击时它就不起作用它,它也不能在命令控制台上运行。我似乎无法导出任何funtioning .jar程序,尽管它们在Eclipse中编译得很好。我假设在使用main方法时我做错了什么?

    import acm.program.*;
    import acm.util.*;

    import java.awt.Color;

    import acm.graphics.*;

    public class CrapsGameTest extends ConsoleProgram{


public static void main (String[] args){
    CrapsGameTest craps = new CrapsGameTest();
    craps.run();


}  


    public void run() {

/*if total = 2, 3, or 12 you loose
 * if total = 7 or 11 you win
 * 
 * */
setFont("Helvetica-40");


int total = rollTwoDice();

if (total == 2 || total == 3 || total==12) {
    println(total +" You loose");
} else if (total == 7 || total == 11) {
        println(total +" You win");
    } else {
        //saves points under the initial TOTAL variable
        int points=total;
        println("your point total is " + points);

        //initializes step by step rolls with i++
        int i = 0;
        while(i>=0) {
            int x = readInt("Roll again?");


            if (x==1) {
                i++;
            }
            //changes the total variable by rolling dice.
            //if the new total variable = points then you win:
            //after every loop "total" variable changes due to the rollTwoDice method.
            total = rollTwoDice();

            if (points ==total) {
                println("You win!");
                break;
                } else if (total == 7) {
                    println("you loose");
                    break;


            }



        }
        }
int y = readInt("Do you wish to play again?");
if (y == 1) {
    run();

}
    }


    private int rollTwoDice() {
int d1 = rgen.nextInt(1,6);
int d2 = rgen.nextInt(1,6);
int total = d1 + d2;
println("Rolling dice: " + d1 + " + "+d2 + " = " + total );
return total;


 }



 //initializes rgen variable
 private RandomGenerator rgen = new RandomGenerator();



 }

1 个答案:

答案 0 :(得分:0)

根据this document

  

Java程序需要从类中的特定方法开始,即   public static void main(String [] args)方法。如果你的程序使用   在ACM库中,您需要编辑代码以获得main()。   只需将以下代码添加到即可轻松完成此操作   具有public void run()的类,用其名称替换   下面的课程。

public static void main (String[] args){
    new CrapsGameTest().start(args);
}

经过那么小的改变,你的出口应该有效。