Question

java的swing中如何在gridbaglayout下把三列组件紧密联在一起

这是我目前的样式图 我想让选择和提交两个按钮以及左侧的文本框连在一起 三者之间不能有空隙这是我的代码add(fileLocation,new Constraints(1,1,1,1,100,100).setAnchor(Constraints.EAST).setFill(Constraints.HORIZONTAL)); add(fileOperation,new Constraints(2,1,1,1,100,100).setAnchor(Constraints.EAST)); add(fileUpload,new Constraints(3,1,1,1,100,100).setAnchor(Constraints.WEST)); 其中Constraints类继承了GridBagConstraints类 构造方法的四个参数分别是gridx gridy gridwidth gridheight weightx weighty这是构造方法的代码public Constraints(int gridx,int gridy,int gridwidth,int gridheight,int weightx,int weighty){ this.gridx=gridx; this.gridy=gridy; this.gridwidth=gridwidth; this.gridheight=gridheight; this.weightx=weightx; this.weighty=weighty; } 怎么弄 谢谢

Answer 1

估计是两个按钮的weightx  weighty 的范围弄错了，我尝试了下你的代码，如下

public class TestFrame {
	public TestFrame() {
		JFrame f = new JFrame();
		JPanel p = new JPanel(new GridBagLayout());
		JTextField fileLocation = new JTextField(20);
		JButton fileOperation = new JButton("OK");
		JButton fileUpload = new JButton("Cancel");
		p.add(fileLocation, new Constraints(0, 0, 1, 1, 1, 1).setFill(GridBagConstraints.HORIZONTAL));
		p.add(fileOperation,new Constraints(1, 0, 1, 1, 0, 0));
		p.add(fileUpload,new Constraints(2, 0, 1, 1, 0, 0));
		
		f.add(p);
		f.pack();
		f.setDefaultCloseOperation(3);
		f.setVisible(true);
	}

	public static void main(String[] args) {
		new TestFrame();
	}
}

class Constraints extends GridBagConstraints {
	public Constraints(int gridx, int gridy, int gridwidth, int gridheight,
			int weightx, int weighty) {
		this.gridx = gridx;
		this.gridy = gridy;
		this.gridwidth = gridwidth;
		this.gridheight = gridheight;
		this.weightx = weightx;
		this.weighty = weighty;
	}
	public Constraints setAnchor(int i){
		this.anchor = i;
		return this;
	}
	public Constraints setFill(int i){
		this.fill = i;
		return this;
	}
}