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eclipse中没有出现错误,但是当我去运行代码时,应用程序没有任何反应。它分为三个等级。第一类包含 if 语句。我想知道我的问题是否在这里。

    package course.infsci0017.lab04;

    import java.util.Scanner;
    import javax.swing.JFrame;

    public class GameOfLife {

public static void main(String[] args) {
    int testCase = 1;

    JFrame frame = new JFrame();
    frame.setSize(500, 500);
    frame.setTitle("Conway's Game of Life");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Cell[][] universe = new Cell[100][100];
    for (int x = 0; x < universe.length-1; x++) {
        for (int y = 0; y < universe[x].length-1; y++) {
            universe[x][y] = new Cell();
        }
    }

    if (testCase == 1) {
        universe[3][2].calculateNext(3);
        universe[3][2].updateCurrent();
        universe[3][3].calculateNext(3);
        universe[3][3].updateCurrent();
        universe[3][4].calculateNext(3);
        universe[3][4].updateCurrent();
    } else if (testCase == 2) {
        universe[49][50].calculateNext(3);
        universe[49][50].updateCurrent();
        universe[49][51].calculateNext(3);
        universe[49][51].updateCurrent();
        universe[50][49].calculateNext(3);
        universe[50][49].updateCurrent();
        universe[50][50].calculateNext(3);
        universe[50][50].updateCurrent();
        universe[51][50].calculateNext(3);
        universe[51][50].updateCurrent();
    } else {
    }

    UniverseComponent component = new UniverseComponent(universe);
    frame.add(component);

    frame.setVisible(true);

    Scanner in = new Scanner(System.in);
    String input = in.nextLine();
    while (input.length() == 0) {
        int neighborCount = 0;
        for (int x=1; x<universe.length-2; x++) {
            for (int y=1; y<universe[x].length-2; y++) {
                neighborCount = 0;
                if (universe[x-1][y-1].isAlive()) {
                    neighborCount++;
                }
                if (universe[x-1][y].isAlive()) {
                    neighborCount++;
                }
                if (universe[x-1][y+1].isAlive()) {
                    neighborCount++;
                }
                if (universe[x][y-1].isAlive()) {
                    neighborCount++;
                }
                if (universe[x][y+1].isAlive()) {
                    neighborCount++;
                }
                if (universe[x+1][y-1].isAlive()) {
                    neighborCount++;
                }
                if (universe[x+1][y].isAlive()) {
                    neighborCount++;
                }
                if (universe[x+1][y+1].isAlive()) {
                    neighborCount++;
                }
                universe[x][y].calculateNext(neighborCount);
            }
        }
        for (int x=1; x<universe.length-2; x++) {
            for (int y=1; y<universe[x].length-2; y++) {
                universe[x][y].updateCurrent();
            }
        }
        component.repaint();
        input = in.nextLine();
    }
    in.close();
}
    }

2 级

    import java.awt.Graphics;
    import java.awt.Graphics2D;

    import javax.swing.JComponent;

    public class UniverseComponent extends JComponent {
private Cell[][] universe;
public UniverseComponent(Cell[][] universe) {
    super();
    this.universe = universe;
}

public void paintComponent(Graphics g) {
    Graphics2D g2 = (Graphics2D)g;

    for (int x=0; x<universe.length-1; x++) {
        for (int y=0; y<universe[x].length-1; y++) {
            if (universe[x][y].isAlive()) {
                g2.fillRect(x*5, y*5, 4, 4);
            }
        }
    }
}

    }

3 级

    public class Cell {
private boolean current;
private boolean next;

public Cell() {
    current = false;
    next = false;
}

public Cell(int neighborCount) {
    calculateNext(neighborCount);
    updateCurrent();
}

public void calculateNext(int neighborCount) {
    if (current) {
        if ((neighborCount < 2) || (neighborCount > 3)) {
            next = false;
        } else {
            next = true;
        }
    } else {
        if (neighborCount == 3) {
            next = true;
        } else {
            next = false;
        }
    }
}

public void updateCurrent() {
    current = next;
}

public boolean isAlive() {
    return current;
}
    }

如果有人知道如何解决此问题,请告诉我。如有必要,请随意复制和粘贴代码。它不会让我发布图片,因为我没有足够的声誉。道歉

4

1 回答 1

1

你的 while 循环说

while (input.length() == 0)

但是,如果您在输入中输入任何内容,它不会等于零,因此不会执行循环并且您的程序将退出。

该程序似乎被设计为只允许用户点击“输入”而不在控制台上输入任何单词。也就是说,如果你只输入回车,将执行循环,否则程序将退出。

这显然不是您自己的代码,因为它似乎没有错误,但您对它的使用不正确。请对你的问题更加诚实(我希望你没有抄袭)。

于 2013-02-28T21:59:21.740 回答