Question

测试Getopt :: Long perl，当使用参数执行时，print命令输出为1而不是提供参数。

以下是代码..无法找到此处缺少的内容。

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

    public class MyPaint{
        public static void main(String[] args){     

    JFrame frame = new JFrame("Just Paint");    

    Container content = frame.getContentPane();

    content.setLayout(new BorderLayout());      

    final PadDraw drawPad = new PadDraw();      

    content.add(drawPad, BorderLayout.CENTER);


    JPanel panel = new JPanel();

    panel.setPreferredSize(new Dimension(100, 68));
    panel.setMinimumSize(new Dimension(100, 68));
    panel.setMaximumSize(new Dimension(100, 68));

            JButton twoX = new JButton ("2");
            twoX.addActionListener(new ActionListener(){

                public void actionPerformed(ActionEvent e){
            drawPad.clear();
        }
    });             


    JButton yellowButton = new JButton("YELLOW");
    yellowButton.setForeground(new Color(204, 204, 0));

    yellowButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.yellow();
        }

    });


    JButton greenButton = new JButton("GREEN");
    greenButton.setForeground(new Color(0, 204, 0));

    greenButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.green();
        }
    });

    JButton redButton = new JButton("RED");
    redButton.setForeground(new Color(255, 0, 0));

    redButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.red();
        }
    });

    JButton blueButton = new JButton("BLUE");
    blueButton.setForeground(Color.BLUE);

    blueButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.blue();
        }
    });

    JButton blackButton = new JButton("BLACK");

    blackButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.black();
        }
    });
    greenButton.setPreferredSize(new Dimension(80, 20));
    redButton.setPreferredSize(new Dimension(80, 20));
    yellowButton.setPreferredSize(new Dimension(80, 20));
    blueButton.setPreferredSize(new Dimension(80, 20));
    greenButton.setPreferredSize(new Dimension(80,20));


    panel.add(blackButton);
    panel.add(blueButton);
    panel.add(redButton);
    panel.add(greenButton);
    panel.add(yellowButton);


    content.add(panel, BorderLayout.NORTH);

    JRadioButton rdbtnPx = new JRadioButton("3 px");
    panel.add(rdbtnPx);

    JRadioButton rdbtnPx_1 = new JRadioButton("5 px");
    panel.add(rdbtnPx_1);

    JRadioButton rdbtnPx_2 = new JRadioButton("12 px");
    panel.add(rdbtnPx_2);


    ButtonGroup bg = new ButtonGroup();
    bg.add(rdbtnPx);
    bg.add(rdbtnPx_1);
    bg.add(rdbtnPx_2);

    rdbtnPx.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.small();
        }
    });
    rdbtnPx_1.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.medium();
        }
    });
    rdbtnPx_2.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.big();
        }
    });

    JButton clearButton = new JButton("Clear");
    clearButton.setBackground(new Color(255, 255, 255));
    clearButton.setFont(UIManager.getFont("TextArea.font"));

    clearButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            drawPad.clear();
        }
    });
    panel.add(clearButton);

    frame.setSize(454, 440);

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.setVisible(true);

}
}


class PadDraw extends JComponent{

private Image image;    
private Graphics2D graphics2D;  
private int currentX , currentY , oldX , oldY ;

public PadDraw(){
    setDoubleBuffered(false);
    addMouseListener(new MouseAdapter(){
        public void mousePressed(MouseEvent e){
            oldX = e.getX();
            oldY = e.getY();
        }
    });

    addMouseMotionListener(new MouseMotionAdapter(){
        public void mouseDragged(MouseEvent e){
            currentX = e.getX();
            currentY = e.getY();
            if(graphics2D != null)
            graphics2D.drawLine(oldX, oldY, currentX, currentY);
            repaint();
            oldX = currentX;
            oldY = currentY;
        }

    });

}   

public void paintComponent(Graphics g){
    if(image == null){
        image = createImage(getSize().width, getSize().height);
        graphics2D = (Graphics2D)image.getGraphics();
        graphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        clear();

    }
    g.drawImage(image, 5, 5, null);
}

public void clear(){
    graphics2D.setPaint(Color.white);
    graphics2D.fillRect(0, 0, getSize().width, getSize().height);
    graphics2D.setPaint(Color.black);
    repaint();
}

public void red(){
    graphics2D.setPaint(Color.red);
    repaint();
}

public void black(){
    graphics2D.setPaint(Color.black);
    repaint();
}

public void yellow(){
    graphics2D.setPaint(Color.yellow);
    repaint();
}

public void blue(){
    graphics2D.setPaint(Color.blue);
    repaint();
}

public void green(){
    graphics2D.setPaint(Color.green);
    repaint();
}
public void small(){
    graphics2D.setStroke(new BasicStroke(1));;
}
public void medium(){
    graphics2D.setStroke(new BasicStroke(5));;
}
public void big(){
    graphics2D.setStroke(new BasicStroke(12));;
}

}

Answer 1

以下表示无参数选项：

"file" => \$file

要接受字符串参数，请使用以下命令：

"file=s" => \$file

Option Specifications

perl Getopt ::长输出问题

1 个答案: