Question

所以，我仍然是java的初学者，我的项目需要几天时间我仍然坚持这两个问题我经常搜索并读到它应该有效但它不会我按下一个按钮时，框架中有一个图像和几个按钮，图像会改变。

public class animals extends JFrame实现了ActionListener {

static JPanel buttons =new JPanel();

static JLabel intro =new JLabel("Guess what the animal that makes the noise and press to find out!");

Icon birdy=new ImageIcon(getClass().getResource("bird.png"));
JLabel bird=new JLabel(birdy,SwingConstants.CENTER);
Icon eleph=new ImageIcon(getClass().getResource("elephant.jpg"));
JLabel elephant=new JLabel(eleph,SwingConstants.CENTER);
Icon tig=new ImageIcon(getClass().getResource("tiger.png"));
JLabel tiger=new JLabel(tig,SwingConstants.CENTER);
Icon wol=new ImageIcon(getClass().getResource("wolf.png"));
JLabel wolf=new JLabel(wol,SwingConstants.CENTER);
Icon caat=new ImageIcon(getClass().getResource("caat.jpg"));
JLabel cat=new JLabel(caat,SwingConstants.CENTER);
Icon coww=new ImageIcon(getClass().getResource("cow.png"));
JLabel cow=new JLabel(coww,SwingConstants.CENTER);
Icon dogy=new ImageIcon(getClass().getResource("dog.png"));
JLabel dog=new JLabel(dogy,SwingConstants.CENTER);
Icon ducky=new ImageIcon(getClass().getResource("duck.jpg"));
JLabel duck=new JLabel(ducky,SwingConstants.CENTER);
Icon horsey=new ImageIcon(getClass().getResource("horse.png"));
JLabel horse=new JLabel(horsey,SwingConstants.CENTER);
Icon moonkey=new ImageIcon(getClass().getResource("monkey.png"));
JLabel monkey=new JLabel(moonkey,SwingConstants.CENTER);
Icon poke=new ImageIcon(getClass().getResource("pokemons.jpg"));
JLabel pokemon=new JLabel(poke,SwingConstants.CENTER);
Icon pika=new ImageIcon(getClass().getResource("pikachu.png"));
JLabel pikachu=new JLabel(pika,SwingConstants.CENTER);
Icon chari=new ImageIcon(getClass().getResource("charizard.png"));
JLabel charizard=new JLabel(chari,SwingConstants.CENTER);
Icon pic=new ImageIcon();
JLabel picture=new JLabel(pic,SwingConstants.CENTER);

static JButton catb=new JButton("Meow~~");
static JButton dogb=new JButton("Woof Woof~~");
static JButton horseb=new JButton("Hihi-n~~");
static JButton duckb=new JButton("Quack~~");
static JButton monkeyb=new JButton("Ki-Ki~~");
static JButton elephantb=new JButton("Pao--n~~");
static JButton cowb=new JButton("Moo~~");
static JButton birdb=new JButton("pichu pichu~~");
static JButton wolfb=new JButton("Awwooo~~");
static JButton tigerb=new JButton("Rawr~~");





public void animals()
{
    animals add =new animals();
    add.setLayout(new FlowLayout());
    add.setVisible(true);
    add.setTitle("Letters");
    add.setSize(500,550);
    add.getContentPane().setBackground(Color.WHITE);

    add.add(intro);

    add.add(pokemon);

    buttons.setBackground(Color.WHITE);
    buttons.setLayout(new BoxLayout(buttons, BoxLayout.Y_AXIS)); 
    buttons.setLayout(new GridLayout(5, 5));

    add.add(catb);
    buttons.add(horseb);
    buttons.add(duckb);
    buttons.add(elephantb);
    buttons.add(dogb);
    buttons.add(birdb);
    buttons.add(tigerb);
    buttons.add(monkeyb);
    buttons.add(wolfb);
    buttons.add(cowb);
    buttons.add(pikachu);
    buttons.add(charizard);
    add.add(picture);
    add.add(buttons);
    catb.addActionListener(add);
    horseb.addActionListener(add);
    elephantb.addActionListener(add);
    duckb.addActionListener(add);
    dogb.addActionListener(add);
    birdb.addActionListener(add);
    tigerb.addActionListener(add);
    monkeyb.addActionListener(add);
    wolfb.addActionListener(add);
    cowb.addActionListener(add);


}

@Override
public void actionPerformed(ActionEvent ae) {

    if(ae.getSource()==catb)
    {
     picture.setIcon(caat);

    }
    if(ae.getSource()==horseb)
    {
        pokemon.setIcon(horsey);
    }



}

}

另一件事是radiobutton 我想按下它时，文本区域颜色会改变再次阅读它应该工作，但它没有

public class colors extends JFrame implements ItemListener {

JPanel pc=new JPanel();

JRadioButton red=new JRadioButton("Red");
JRadioButton blue=new JRadioButton("Blue");
JRadioButton black=new JRadioButton("Black");
JRadioButton pink=new JRadioButton("Pink");
JRadioButton yellow=new JRadioButton("Yellow");
JRadioButton green=new JRadioButton("Green");
JRadioButton orange=new JRadioButton("Orange");

Icon meow=new ImageIcon(getClass().getResource("meowtwo.png"));
JLabel meowtwo=new JLabel(meow,SwingConstants.CENTER);

JLabel hi=new JLabel("explore the colors !!!");

JTextArea color=new JTextArea(20,40);

static ButtonGroup col=new ButtonGroup();



public void colors()
{
    colors add =new colors();
    add.setLayout(new FlowLayout());
    add.setVisible(true);
    add.setTitle("Letters");
    add.setSize(500,550);
    add.getContentPane().setBackground(Color.DARK_GRAY);
    pc.setBackground(Color.GRAY);
    hi.setFont(new Font("Serif",Font.BOLD,40));
    color.setEditable(false);
    col.add(red);
    col.add(blue);
    col.add(black);
    col.add(pink);
    col.add(yellow);
    col.add(green);
    col.add(orange);

    color.setBackground(color.getBackground());
    pc.add(hi);
    pc.add(meowtwo);


    add.add(pc);
    add.add(red);
    add.add(blue);
    add.add(black);
    add.add(pink);
    add.add(yellow);
    add.add(green);
    add.add(orange);
    add.add(color);

    red.addItemListener(add);
    blue.addItemListener(add);
    black.addItemListener(add);
    pink.addItemListener(add);
    yellow.addItemListener(add);
    green.addItemListener(add);
    orange.addItemListener(add);



}

@Override
public void itemStateChanged(ItemEvent ie) {
    colors add=new colors();
    if(red.isSelected())
    {
        add.getContentPane().setBackground(Color.yellow);
    }
    else
        color.setBackground(Color.yellow);
}

}

我知道我的代码不是最好的，但我仍然在学习请帮助这个可怜的苦苦挣扎的学生

Answer 1

animals add =new animals();删除此行
colors add = new colors();并删除此行。

因为您已经说过您的类扩展JFrame，所以您不需要创建任何类的实例。而是将add替换为关键字this而不是一切都应该有效。

也是因为您的类实现了ActionListener接口，您可以说wolfb.addActionListener(this)或orange.addItemListener(this);这将告诉编译器查找itemStateChanged或actionPerformed方法在那堂课。

当您进行这些更改时，您的代码应该按预期工作:)

单击按钮时用另一个图像更改图像，选择单选按钮时更改jtextarea

1 个答案: