Question

由于某种原因，我一直无法弄清楚，我已经工作了一段时间的程序现在没有运行。这是我收到的错误消息：

我在它工作的时间和现在之间所做的一切都是添加另一个类，但即使删除它之后，错误信息仍然在这里。 Netbeans也没有帮助，代码中没有任何标记为红色的错误。我还是Java的初学者，所以我不知道找到错误需要多少，所以这里是所有的代码：

public class ChooseYourOwn {
static class Character {
    private static int str;
    public Character() {
        int str = 0;
        int spd = 0;
        int agl = 0;
        int def = 0;
        int mag = 0;
        int wil = 0;
        int mp = 0;
        int hp = 0;
    }
    private Character(String name) {
    }
    }

/**
 *
 * @param args
 * @return
 */

public static int main(String[] args) {
    //set up character
    System.out.println("Choose a class:");
    String [] genusOptions;
    genusOptions = new String[] {"\n1-Warrior\n2-Mage\n3-Thief"};
    System.out.println(Arrays.toString(genusOptions));
    Scanner input1 = new Scanner(System.in);
    String genus;
    genus = input1.nextLine();
    System.out.println("Your character's stats are:");
    switch (genus) {
        case "1":
            {
                String[] array = new String[] {"\nStrength-15\nSpeed-5\nAgility-5\nDefense-10\nMagicDamage-5\nMagicDefense-0\nMagicPoints-5\nHitPoints-15\n"};
                System.out.println(Arrays.toString(array));
                int str = 5; 
                int spd = 2;
                int agl = 2;
                int def = 5;
                int mag = 0;
                int wil = 0;
                int mp = 0; 
                int hp = 10;
                break;
            }
        case "2":
            {
                String[] array = new String[] {"\nStrength-5\nSpeed-5\nAgility-5\nDefense-0\nMagicDamage-15\nMagicDefense-10\nMagicPoints-15\nHitPoints-5\n"};
                System.out.println(Arrays.toString(array));
                int str = 5; 
                int spd = 5;
                int agl = 5;
                int def = 0;
                int mag = 10;
                int wil = 10;
                int mp = 15; 
                int hp = 5;
                break;
            }
        case "3":
            {
                String[] array = new String[] {"\nStrength-10\nSpeed-15\nAgility-15\nDefense-10\nMagicDamage-10\nMagicDefense-5\nMagicPoints-10\nHitPoints-10\n"};
                System.out.println(Arrays.toString(array));
                int str = 10; 
                int spd = 15;
                int agl = 15;
                int def = 10;
                int mag = 10;
                int wil = 5;
                int mp = 10;
                int hp = 10;
                break;
            }
    }
    String[] array = new String[] {"\n1-Move\n2-Rest\n3-Attack\n4-Run\n5-Activate lever/button/chest\n6-Inventory\n7-Skills"};
    System.out.println("Choose a number to continue");
    System.out.println(Arrays.toString(array));
    Scanner input2;
    input2 = new Scanner(System.in);
    String action;
    action = input2.nextLine();
    switch (action) {
        case "1":
            {
                System.out.println("");
                //not done yet
                break;
            }
        case "2":
            {
                System.out.println("");
                //Rest, restores some health
                break;
            }
        case "3":
            {
                System.out.println("");
                int max = 100;
                int min = 0;
                Random rand = new Random();
                int randomNum = rand.nextInt((max - min) + 1) + min;
                int damage = 0;
                if (10 > randomNum) {
                    damage = (Character.str/100) * 10;
                } else if (20 > randomNum) {
                    damage = (Character.str/100) * 20;
                } else if (30 > randomNum) {
                    damage = (Character.str/100) * 30;
                } else if (40 > randomNum) {
                    damage = (Character.str/100) * 40;
                } else if (50 > randomNum) {
                    damage = (Character.str/100) * 50;
                } else if (60 > randomNum) {
                    damage = (Character.str/100) * 60;
                } else if (70 > randomNum) {
                    damage = (Character.str/100) * 70;
                } else if (80 > randomNum) {
                    damage = (Character.str/100) * 80;
                } else if (90 > randomNum) {
                    damage = (Character.str/100) * 90;
                } else if (100 > randomNum) {
                    damage = Character.str;
                }
                System.out.println( damage );
                break;
                }
        case "4":
            {
                System.out.println("");
                //not done yet
                break;
            }
        case "5":
            {
                System.out.println("");
                //not done yet
                break;
            }
        case "6":
            {
                System.out.println("");
                //not done yet
                break;
            }
        case "7":
            {
                System.out.println("");
                //not done yet
            }       
    }
    return (0);
}
}

之前有过类似的问题，但没有一个问题有帮助，其他问题也不清楚。非常感谢一个好的和连贯的答案，谢谢。

Answer 1

在Java中，主要方法签名是 public static void main(String[] args) ，但是在您的代码中，您使用的是public static int main(String[] args)。

Answer 2

Java主要方法声明如下：

public static void main(String[] args) {
...
}

可在Can a main method in Java return something?

找到更多信息

Answer 3

您无法更改main的返回类型。此，

public static int main(String[] args)

必须是（每个值得Wikipedia article on Entry point）

之一

public static void main(String[] args)
public static void main(String... args)
public static void main(String args[])

所有这些都是void，如果您需要设置UNIX样式返回类型，可以使用System.exit(int);来引用Javadoc

终止当前运行的Java虚拟机。该参数用作状态代码;按照惯例，非零状态代码表示异常终止。

在Java中找不到主类？

3 个答案: