Question

我想在for循环中使用gridbaglayout来布局固定大小的静态不可编辑网格。然而，当我这样做时，我什么都没得到。这是我作为SSCEE的第一次尝试：

import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

class ViewManager extends JFrame{

private static final long serialVersionUID = 1L;
private NewCharacterVitalsPane myNewCharacterVitalsPane = null;

public ViewManager(){
    super("Tony Larp DB Manager");
    this.setVisible(true);
    this.setDefaultCloseOperation(3);
    myNewCharacterVitalsPane = new NewCharacterVitalsPane();
    this.getContentPane().add(myNewCharacterVitalsPane);
    this.pack();        
}
static class Util {
    static private ViewManager viewManager = null;
    static public synchronized ViewManager getInstance() {
        if (viewManager == null) {
            viewManager = new ViewManager();
        }
        return viewManager;
    }
}
}

public class Launcher {

public static void main(String[] args) 
{
    SwingUtilities.invokeLater(new Runnable(){
        public void run(){
            ViewManager.Util.getInstance();
        }
    });
}
}

class NewCharacterVitalsPane extends JPanel{

private static final long serialVersionUID = 1962802485168533544L;
String locations[] = {"H","Ch","Ra","La","Rl","Ll"};
int armour[] = {0,0,0,0,10,0};
int life = 30;

/*subPanes*/
JPanel battleBoardPane = new JPanel();


public NewCharacterVitalsPane (){
    addSubPanes();
    drawBattleBoard();
}
private void addSubPanes() {
    this.setLayout(new GridBagLayout());
    GridBagConstraints SPgbc = new GridBagConstraints();
    SPgbc.fill = GridBagConstraints.BOTH;

    SPgbc.gridx = 0;
    SPgbc.gridy = 1;
    SPgbc.gridheight = 2;
    SPgbc.ipadx = 100;
    SPgbc.ipady = 180;
    battleBoardPane.setBorder(BorderFactory.createLineBorder(Color.black));
    add(battleBoardPane,SPgbc);
}

private void drawBattleBoard(){
    this.setLayout(new GridBagLayout());
    GridBagConstraints BBgbc = new GridBagConstraints();
    BBgbc.gridx=0;BBgbc.gridy=0;
    for (String location:locations){
        JLabel locLabel = new JLabel(location+": ");
        BBgbc.gridy++; battleBoardPane.add(locLabel,BBgbc);
    }
}
}

目前它只显示一行中的所有标签，而不是一个接一个地显示。为什么这样，我怎么能得到我想要的行为？

Answer 1

将布局管理员battleBoardPane设置为GridbagLayout （据我所知，默认为FlowLayout它不会从包含窗格“继承”它。）

Answer 2

第一个答案是对的，但是您更错了代码。

而不是this.setLayout(new GridBagLayout());

drawBattleBoard()方法的第一行

你必须写

battleBoardPane.setLayout(new GridBagLayout());

迭代地使用gridbaglayout添加组件？

2 个答案: