ArrayIndexOutOfBoundsException 二维游戏开发

Question

我一直在关注这个 tutorial 但我不知道错误在哪里下面的 2 class 正在解释所有事情因为它只有两个 class 我试图观看再次教程，但我仍然没有发现错误

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package gameofthrones;

import java.awt.*;
import javax.swing.*;

/**
 *
 * @author issba
 */
public class ClassOGP extends JFrame{
    boolean fse =false;
    int fsm = 0;
    GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[1];
    public ClassOGP(String title,int width,int height){
        setTitle(title);
        setSize(width,height);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);


    }

    private void setfullscreen(){
        switch(fsm){
            case 0:
                System.out.println("No fullscreen");
                setUndecorated(false);
            break;
            case 1:
                setExtendedState(JFrame.MAXIMIZED_BOTH);
                setUndecorated(true);
            break;
            case 2:
                device.setFullScreenWindow(this);
                setUndecorated(true);
            break;
        }

    }

    public void setFullscreen(int fsnm){
           fse = true;
           if(fsm <= 2){
           this.fsm = fsnm;
           setfullscreen();
           }else{
           System.err.println("Error " + fsnm + " is not supported");
           }
        }
    }

这是主要的class里面没有太多代码。

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package gameofthrones;


/**
 *
 * @author issba
 */
public class Main {

    /**
     * @param args the command line arguments
     */

    public static void main(String[] args) {
        ClassOGP frame = new ClassOGP("Game Of thrones",1280,720);
        frame.setFullscreen(1);
        frame.setVisible(true);
    }

}

错误信息在这里

    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
    at gameofthrones.ClassOGP.<init>(ClassOGP.java:18)
    at gameofthrones.Main.main(Main.java:20)
C:\Users\issba\AppData\Local\NetBeans\Cache.1\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 second)

Answer 1

当您尝试访问具有非法数组索引或超出数组范围的元素时发生错误。

Answer 2

这一行：

GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[1];

正在抛出错误。尝试将 1 更改为 0。

虽然这只是一个快速修复，您应该将设备声明为实例或 class 成员并在构造函数中分配它。然后如果没有屏幕设备就可以进行错误检查。像下面这样：

public class ClassOGP extends JFrame{
    /* other code */

    public GraphicsDevice device;

    public ClassOGP(String title,int width,int height) {
        if(GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices().length() > 0) {
            // you can also check for multiple devices here to see if you want
            // to use one other than the zero'th index
            device = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0];
        } else {
            System.out.println("ERROR: No devices ... exiting.");
            System.exit();
        }

        /* other code */
    }

    /* rest of class */
}

ArrayIndexOutOfBoundsException 二维游戏开发

ArrayIndexOutOfBoundsException 2D game Development

java

2d-games