GridBagLayout 例
import java.awt.Dimension;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.GridLayout;import java.awt.Insets;import javax.swing.*;public class Layout2 { /** * @param args */ public static void main(String[] args) { new Layout2Frame().setVisible(true); }}class Layout2Frame extends JFrame { Layout2Frame(){ this.setTitle("Layout2 Test"); this.setSize(800,800); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel jp = new JPanel(); jp.setLayout(new GridBagLayout()); jp.add(new JScrollPane(new JTextArea(1,5)),new Constraint(0,0,1,3)); JPanel p1 = new JPanel(); p1.setLayout(new GridLayout(2,1)); p1.setBorder(BorderFactory.createEtchedBorder()); p1.add(new JLabel("标 签")); p1.add(new JTextField(5)); jp.add(p1,new Constraint(3,0)); jp.add(new MPanel2(),new Constraint(4,0,1,2)); jp.add(new MPanel2(),new Constraint(6,0,1,1)); JPanel p2 = new JPanel(); p2.setLayout(new GridLayout(2,1)); p2.setBorder(BorderFactory.createEtchedBorder()); p2.add(new JButton("按钮")); p2.add(new JButton("按钮")); jp.add(p2,new Constraint(0,1)); jp.add(new MPanel2(),new Constraint(1,1)); jp.add(new MPanel2(),new Constraint(2,1)); jp.add(new JScrollPane(new JTextArea(1,5)),new Constraint(3,1)); MPanel2 mp = new MPanel2(); /*mp.add(new JButton("hellp")); mp.add(new JButton("hellp")); mp.add(new JButton("hellp")); mp.add(new JButton("hellp"));*/ jp.add(mp,new Constraint(4,1)); jp.add(new MPanel2(),new Constraint(5,1)); jp.add(new MPanel2(),new Constraint(6,1)); add(jp); }}class MPanel2 extends JPanel { MPanel2(){ /*Dimension d = new Dimension(100,100); //this.setPreferredSize(new Dimension(60,60)); this.setMaximumSize(d); this.setMinimumSize(d);*/ add(new JLabel("面板")); this.setBorder(BorderFactory.createEtchedBorder()); }}class Constraint extends GridBagConstraints { Constraint(int gridx,int gridy) { this.gridx = gridx; //gridx,gridy 指表格坐标.指此物件的开始位置在(x,y)处,也即在 x列,y行处 ,x,y 都从0开始. this.gridy = gridy; this.setFill(Constraint.BOTH); //默认物作是居中的.设成both后如果物件比所占area小就会在横竖两个方向拉伸 //this.setWeight(100, 100);//空白区域怎么分配. this.setInsets(1);//边界 } Constraint(int gridx,int gridy,int gridheight,int gridwidth) { this(gridx,gridy); //高和宽指物件占用的空间 , 四个参数可理解 了 ,x,y,dy,dx this.gridheight = gridheight; this.gridwidth = gridwidth; } public Constraint setFill(int fill) { this.fill = fill; return this; } public Constraint setAnchor(int anchor) { this.anchor = anchor; //是指物件放在所在区域的什么位置,默认是center CENTER, NORTH, NORTHEAST, EAST, SOUTHEAST, SOUTH, SOUTHWEST, WEST, //and NORTHWEST. The relative values are: PAGE_START, PAGE_END, LINE_START, LINE_END, FIRST_LINE_START, FIRST_LINE_END, LAST_LINE_START and LAST_LINE_END. The default value is CENTER return this; } public Constraint setWeight(double weightx,double weighty) { this.weightx = weightx; this.weighty = weighty; return this; } public Constraint setInsets(int distance){ this.insets = new Insets(distance,distance,distance,distance); return this; }}TAG:
