Java将按钮动态添加为数组 [英] Java add buttons dynamically as an array

问题描述

可能重复：

java - 如何在点击时动态地将swing组件添加到gui？

我想动态添加按钮数组。
我试过这样：

  this.pack（）; 
面板小组=新小组（）; 
 panel.setLayout（new FlowLayout（））; 
 this.add（面板）; 
 panel.setVisible（true）; 
 for（int i = 0; i< Setting.length; i ++）{
 for（int j = 0; j< Setting.width; j ++）{
 JButton b = new JButton的第（i + ）; 
 b.setSize（30,30）; 
 b.setLocation（i * 30，j * 30）; 
 panel.add（b）; 
 b.setVisible（true）; 
} 
} 
  

但没有得到任何东西，我犯了什么错make？

编辑

我有jFrame类选择我有一个按钮，当我按下按钮，这应该发生：

  private void jButton1ActionPerformed（java.awt.event.ActionEvent evt）{
 // TODO在这里添加你的处理代码：
 structure.Setting s = new Setting（8,8,3,1,1）; 
游戏g =新游戏（）; 
 g.setSetting（s）; 
 this.dispose（）; 
 g.show（）; 
} 
  

然后我去Game类（也是jFrame类）到函数setSetting它是这样的：

  void setSetting（Setting s）{
 this.setting = s; 
 structure.Game game = new structure.Game（setting）; 
 JPanel panel = new JPanel（new GridLayout（5,5,4,4））; 
 for（int i = 1; i< = 5; i ++）{
 for（int j = 1; j< = 5; j ++）{
 JButton b = new JButton（将String.valueOf（I））; 
 panel.add（b）; 
} 
} 
 add（面板）; 
 pack（）; 
 setVisible（true）; 
} 
 structure.Setting setting; 
} 
  

解决方案

您可以使用 GridLayout 添加相同的高度/宽度按钮：

 公共类游戏扩展了JFrame {
私有JPanel面板; 
 public Game（int rows，int cols，int hgap，int vgap）{
 panel = new JPanel（new GridLayout（rows，cols，hgap，vgap））; 
 for（int i = 1; i< = rows; i ++）
 {
 for（int j = 1; j< = cols; j ++）
 {
 JButton btn = new JButton（String.valueOf（i））; 
 panel.add（btn）; 
} 
} 
 add（面板）; 
 pack（）; 
 setVisible（true）; 
} 
} 
  

按钮处理程序中的代码应为：

  private void jButton1ActionPerformed（java.awt.event.ActionEvent evt）{
 Game g = new Game（5,5,3） ，3）; 
} 
  

请注意，您也可以传递设置对象引用通过 Game 构造函数（当你可以动态添加小部件时）而不是调用 setSetting 方法。 / p>

Possible Duplicate:
java - How would I dynamically add swing component to gui on click?

I want to add array of buttons dynamically. I tried like this:

this.pack();
    Panel panel = new Panel();
    panel.setLayout(new FlowLayout());
    this.add(panel);
    panel.setVisible(true);
    for (int i = 0; i < Setting.length; i++) {
        for (int j = 0; j < Setting.width; j++) {
            JButton b = new JButton(i+"");
            b.setSize(30, 30);
            b.setLocation(i * 30, j * 30);
            panel.add(b);
            b.setVisible(true);
        }
    }

but didn't get anything , what mistake did I make?

Edit

I have jFrame class "choices" on it i have a button , when I press the button, this is supposed to happen:

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
       structure.Setting s = new Setting(8, 8, 3, 1, 1);
       Game g = new Game();
       g.setSetting(s);
       this.dispose();
       g.show();
    }

then i go to the Game class (also jFrame class) to the function setSetting and it is like this:

void setSetting(Setting s) {
        this.setting = s;
        structure.Game game = new structure.Game(setting);
        JPanel panel = new JPanel(new GridLayout(5, 5, 4, 4));
        for (int i = 1; i <= 5; i++) {
            for (int j = 1; j <= 5; j++) {
                JButton b = new JButton(String.valueOf(i));
                panel.add(b);
            }
        }
        add(panel);
        pack();
        setVisible(true);
    }
    structure.Setting setting;
}

解决方案

You may use GridLayout to add equal height/width buttons:

public class Game extends JFrame {
    private JPanel panel;
    public Game(int rows,int cols,int hgap,int vgap){
        panel=new JPanel(new GridLayout(rows, cols, hgap, vgap));
        for(int i=1;i<=rows;i++)
        {
            for(int j=1;j<=cols;j++)
            {
                JButton btn=new JButton(String.valueOf(i));
                panel.add(btn);
            }
        }
        add(panel);
        pack();
        setVisible(true);
    }
}

and code in button's handler should be:

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
   Game g = new Game(5,5,3,3);
}

Note that you can also pass Setting object reference via Game constructor (when you may add widgets dynamically) instead of calling setSetting method.

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