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オンラインで見つけたスコアリング GUI の例に「グリーン チーム」を追加しようとしています。何らかの理由で、コードはコンパイルされますが、元の 2 つのチームだけで実行されます。私はサイズ/場所をやや不器用にいじってみました. 何か助けはありますか？コードは次のとおりです。

import javax.swing.*;

import java.awt.Color;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;


public class ButtonDemo_Extended3 implements  ActionListener{



    // Definition of global values and items that are part of the GUI.

    int redScoreAmount = 0;

    int blueScoreAmount = 0;
    int greenScoreAmount = 0;



    JPanel titlePanel, scorePanel, buttonPanel;

    JLabel redLabel, blueLabel,greenLabel, redScore, blueScore, greenScore;

    JButton redButton, blueButton, greenButton,resetButton;



    public JPanel createContentPane (){



        // We create a bottom JPanel to place everything on.

        JPanel totalGUI = new JPanel();

        totalGUI.setLayout(null);



        // Creation of a Panel to contain the title labels

        titlePanel = new JPanel();

        titlePanel.setLayout(null);

        titlePanel.setLocation(0, 0);

        titlePanel.setSize(500, 500);

        totalGUI.add(titlePanel);



        redLabel = new JLabel("Red Team");

        redLabel.setLocation(300, 0);

        redLabel.setSize(100, 30);

        redLabel.setHorizontalAlignment(0);

        redLabel.setForeground(Color.red);

        titlePanel.add(redLabel);



        blueLabel = new JLabel("Blue Team");

        blueLabel.setLocation(900, 0);

        blueLabel.setSize(100, 30);

        blueLabel.setHorizontalAlignment(0);

        blueLabel.setForeground(Color.blue);

        titlePanel.add(blueLabel);

    greenLabel = new JLabel("Green Team");

        greenLabel.setLocation(600, 0);

        greenLabel.setSize(100, 30);

        greenLabel.setHorizontalAlignment(0);

        greenLabel.setForeground(Color.green);

        titlePanel.add(greenLabel);



        // Creation of a Panel to contain the score labels.

        scorePanel = new JPanel();

        scorePanel.setLayout(null);

        scorePanel.setLocation(10, 40);

        scorePanel.setSize(500, 30);

        totalGUI.add(scorePanel);



        redScore = new JLabel(""+redScoreAmount);

        redScore.setLocation(0, 0);

        redScore.setSize(40, 30);

        redScore.setHorizontalAlignment(0);

        scorePanel.add(redScore);

    greenScore = new JLabel(""+greenScoreAmount);

        greenScore.setLocation(60, 0);

        greenScore.setSize(40, 30);

        greenScore.setHorizontalAlignment(0);

        scorePanel.add(greenScore);



        blueScore = new JLabel(""+blueScoreAmount);

        blueScore.setLocation(130, 0);

        blueScore.setSize(40, 30);

        blueScore.setHorizontalAlignment(0);

        scorePanel.add(blueScore);



        // Creation of a Panel to contain all the JButtons.

        buttonPanel = new JPanel();

        buttonPanel.setLayout(null);

        buttonPanel.setLocation(10, 80);

        buttonPanel.setSize(2600, 70);

        totalGUI.add(buttonPanel);



        // We create a button and manipulate it using the syntax we have

        // used before. Now each button has an ActionListener which posts 

        // its action out when the button is pressed.

        redButton = new JButton("Red Score!");

        redButton.setLocation(0, 0);

        redButton.setSize(30, 30);

        redButton.addActionListener(this);

        buttonPanel.add(redButton);



        blueButton = new JButton("Blue Score!");

        blueButton.setLocation(150, 0);

        blueButton.setSize(30, 30);

        blueButton.addActionListener(this);

        buttonPanel.add(blueButton);

    greenButton = new JButton("Green Score!");

        greenButton.setLocation(250, 0);

        greenButton.setSize(30, 30);

        greenButton.addActionListener(this);

        buttonPanel.add(greenButton);



        resetButton = new JButton("Reset Score");

        resetButton.setLocation(0, 100);

        resetButton.setSize(50, 30);

        resetButton.addActionListener(this);

        buttonPanel.add(resetButton);



        totalGUI.setOpaque(true);

        return totalGUI;

    }



    // This is the new ActionPerformed Method.

    // It catches any events with an ActionListener attached.

    // Using an if statement, we can determine which button was pressed

    // and change the appropriate values in our GUI.

    public void actionPerformed(ActionEvent e) {

        if(e.getSource() == redButton)

        {

            redScoreAmount = redScoreAmount + 1;

            redScore.setText(""+redScoreAmount);

        }

        else if(e.getSource() == blueButton)

        {

            blueScoreAmount = blueScoreAmount + 1;

            blueScore.setText(""+blueScoreAmount);

        }
    else if(e.getSource() == greenButton)

        {

            greenScoreAmount = greenScoreAmount + 1;

            greenScore.setText(""+greenScoreAmount);

        }

        else if(e.getSource() == resetButton)

        {

            redScoreAmount = 0;

            blueScoreAmount = 0;
        greenScoreAmount = 0;

            redScore.setText(""+redScoreAmount);

            blueScore.setText(""+blueScoreAmount);
        greenScore.setText(""+greenScoreAmount);

        }

    }



    private static void createAndShowGUI() {



        JFrame.setDefaultLookAndFeelDecorated(true);

        JFrame frame = new JFrame("[=] JButton Scores! [=]");



        //Create and set up the content pane.

        ButtonDemo_Extended demo = new ButtonDemo_Extended();

        frame.setContentPane(demo.createContentPane());



        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(1024, 768);

        frame.setVisible(true);

    }



    public static void main(String[] args) {

        //Schedule a job for the event-dispatching thread:

        //creating and showing this application's GUI.

        SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                createAndShowGUI();

            }

        });

    }

}
4

2 に答える 2

1 
import javax.swing.*;

import java.awt.Color;
import java.awt.FlowLayout;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;


public class ButtonDemo_Extended3 implements  ActionListener{



// Definition of global values and items that are part of the GUI.

int redScoreAmount = 0;

int blueScoreAmount = 0;
int greenScoreAmount = 0;



JPanel titlePanel, scorePanel, buttonPanel;

JLabel redLabel, blueLabel,greenLabel, redScore, blueScore, greenScore;

JButton redButton, blueButton, greenButton,resetButton;



public JPanel createContentPane (){



    // We create a bottom JPanel to place everything on.

    JPanel totalGUI = new JPanel();

    totalGUI.setLayout(null);



    // Creation of a Panel to contain the title labels

    titlePanel = new JPanel();

    titlePanel.setLayout(new FlowLayout());

    titlePanel.setLocation(0, 0);

    titlePanel.setSize(500, 500);





    redLabel = new JLabel("Red Team");

    redLabel.setLocation(300, 0);

    redLabel.setSize(100, 30);

    redLabel.setHorizontalAlignment(0);

    redLabel.setForeground(Color.red);

    titlePanel.add(redLabel, 0 );



    blueLabel = new JLabel("Blue Team");

    blueLabel.setLocation(900, 0);

    blueLabel.setSize(100, 30);

    blueLabel.setHorizontalAlignment(0);

    blueLabel.setForeground(Color.blue);

    titlePanel.add(blueLabel, 1);

greenLabel = new JLabel("Green Team");

    greenLabel.setLocation(600, 0);

    greenLabel.setSize(100, 30);

    greenLabel.setHorizontalAlignment(0);

    greenLabel.setForeground(Color.green);

    titlePanel.add(greenLabel);



    // Creation of a Panel to contain the score labels.

    scorePanel = new JPanel();

    scorePanel.setLayout(null);

    scorePanel.setLocation(10, 40);

    scorePanel.setSize(500, 30);





    redScore = new JLabel(""+redScoreAmount);

    redScore.setLocation(0, 0);

    redScore.setSize(40, 30);

    redScore.setHorizontalAlignment(0);

    scorePanel.add(redScore);

greenScore = new JLabel(""+greenScoreAmount);

    greenScore.setLocation(60, 0);

    greenScore.setSize(40, 30);

    greenScore.setHorizontalAlignment(0);

    scorePanel.add(greenScore);



    blueScore = new JLabel(""+blueScoreAmount);

    blueScore.setLocation(130, 0);

    blueScore.setSize(40, 30);

    blueScore.setHorizontalAlignment(0);

    scorePanel.add(blueScore);



    // Creation of a Panel to contain all the JButtons.

    buttonPanel = new JPanel();

    buttonPanel.setLayout(null);

    buttonPanel.setLocation(10, 80);

    buttonPanel.setSize(2600, 70);





    // We create a button and manipulate it using the syntax we have

    // used before. Now each button has an ActionListener which posts 

    // its action out when the button is pressed.

    redButton = new JButton("Red Score!");

    redButton.setLocation(0, 0);

    redButton.setSize(30, 30);

    redButton.addActionListener(this);

    buttonPanel.add(redButton);



    blueButton = new JButton("Blue Score!");

    blueButton.setLocation(150, 0);

    blueButton.setSize(30, 30);

    blueButton.addActionListener(this);

    buttonPanel.add(blueButton);

greenButton = new JButton("Green Score!");

    greenButton.setLocation(250, 0);

    greenButton.setSize(30, 30);

    greenButton.addActionListener(this);

    buttonPanel.add(greenButton);



    resetButton = new JButton("Reset Score");

    resetButton.setLocation(0, 100);

    resetButton.setSize(50, 30);

    resetButton.addActionListener(this);

    buttonPanel.add(resetButton);



    totalGUI.setOpaque(true);

    totalGUI.add(buttonPanel);
    totalGUI.add(scorePanel);
    totalGUI.add(titlePanel);

    return totalGUI;

}



// This is the new ActionPerformed Method.

// It catches any events with an ActionListener attached.

// Using an if statement, we can determine which button was pressed

// and change the appropriate values in our GUI.

public void actionPerformed(ActionEvent e) {

    if(e.getSource() == redButton)

    {

        redScoreAmount = redScoreAmount + 1;

        redScore.setText(""+redScoreAmount);

    }

    else if(e.getSource() == blueButton)

    {

        blueScoreAmount = blueScoreAmount + 1;

        blueScore.setText(""+blueScoreAmount);

    }
else if(e.getSource() == greenButton)

    {

        greenScoreAmount = greenScoreAmount + 1;

        greenScore.setText(""+greenScoreAmount);

    }

    else if(e.getSource() == resetButton)

    {

        redScoreAmount = 0;

        blueScoreAmount = 0;
    greenScoreAmount = 0;

        redScore.setText(""+redScoreAmount);

        blueScore.setText(""+blueScoreAmount);
    greenScore.setText(""+greenScoreAmount);

    }

}



private static void createAndShowGUI() {



    JFrame.setDefaultLookAndFeelDecorated(true);

    JFrame frame = new JFrame("[=] JButton Scores! [=]");



    //Create and set up the content pane.

    ButtonDemo_Extended3 demo = new ButtonDemo_Extended3();

    frame.setContentPane(demo.createContentPane());



    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.setSize(1024, 768);

    frame.setVisible(true);

}



public static void main(String[] args) {

    //Schedule a job for the event-dispatching thread:

    //creating and showing this application's GUI.

    SwingUtilities.invokeLater(new Runnable() {

        public void run() {

            createAndShowGUI();

        }

    });

}

}

ウィジェットを表示するには、レイアウト マネージャーを使用する必要があります。この場合、FlowLayout() を使用しました。また、最初に要素をパネルに追加してから、パネルをその親パネルに追加してください。

これで、コードはおそらく希望どおりに機能しますが、フレーム内にパネルを配置するには、特定のレイアウトを使用する必要があります。

于 2012-10-17T23:25:22.497 に答える
0

コードを変更せずに実行すると、"Red Team" ラベルと、小さすぎてテキストを読み取れないボタンがいくつか表示されます (マウスを重ねたときにのみ表示されるボタンもあります)。

null レイアウトをすべてコメントアウトすると、次のようになります。

    //buttonPanel.setLayout(null);

3 つすべてのボタンとラベルが正しく表示されます。

レイアウト マネージャーを使用せずに絶対配置を使用することは可能ですが (この正確なトピックについてはJava Swing チュートリアルページを参照してください)、通常はお勧めしません。Swing チュートリアルのコンテナ内でのコンポーネントのレイアウト レッスンには、レイアウト マネージャーの使用に関する多くの情報があります。

于 2012-10-17T23:13:25.353 に答える