JAVA 图形用户界面的编程-控件与布局

附：实验源程序代码import java.awt.BorderLayout;import java.awt.Font;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;class Frame1 extends JFrame //设计一个窗体类{JButton jb1, jb2, jb3; //按钮JLabel jl; //标签Frame1() //构造方法{jb1 =new JButton("红色"); //创建按钮对象jb2 = new JButton("绿色") ;jb3 = new JButton("蓝色") ;jl = new JLabel("设定标签颜色") ; //创建标签对象jl.setFont(new Font("隶书", Font.PLAIN, 32)); //标签字体JPanel jp1 = new JPanel(); //面板1JPanel jp2 = new JPanel(); //面板2jp1 .add(jl); //标签放入面板1jp2 .add(jb1); //三个按键放入面板2jp2 .add(jb2);jp2 .add(jb3);setLayout( new BorderLayout() ); //窗体设定为边界布局add(jp1, BorderLayout.NORTH ) ; //标签面板放在窗体上端add(jp2, BorderLayout.CENTER ); //按钮面板放在窗体中间setSize(250,150) ; //设定窗体大小和位置setTitle("实验6-1") ; //设定窗体标题setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setVisible(true) ; //设定窗体可见}}class Experiment9_1{public static void main(String[] args){new Frame1();}}import javax.swing.*;import java.awt.*;class Framel extends JFrame{JButton submit;JLabel lb_id,lb_name,lb_sex,lb_ty,lb_bj,lb_desc;JTextField jtf_id,jtf_name;JRadioButton male,female;JCheckBox ck_ty;JComboBox cb_bj;JTextArea txta_desc;Framel(){lb_id = new JLabel("学号:",JLabel.RIGHT);lb_name = new JLabel("姓名:",JLabel.RIGHT);lb_sex = new JLabel("性别：",JLabel.RIGHT);lb_ty = new JLabel("团员",JLabel.RIGHT);lb_bj = new JLabel("班级",JLabel.RIGHT);lb_desc = new JLabel("简介",JLabel.RIGHT);jtf_id = new JTextField(12);jtf_name = new JTextField(12);male = new JRadioButton("男");female = new JRadioButton("女");ck_ty = new JCheckBox();txta_desc = new JTextArea(5,11);male.setSelected(true);ButtonGroup bg_sex = new ButtonGroup();bg_sex.add(male);bg_sex.add(female);String items[] = {"网络信息1011","软件1011","系统维护1011"};cb_bj = new JComboBox(items);JPanel jtf = new JPanel();JPanel jtf2 = new JPanel();JPanel jtf3 = new JPanel();JPanel jtf4 = new JPanel();JPanel jtf5 = new JPanel();jtf.add(lb_id);jtf.add(jtf_id);jtf2.add(lb_name);jtf2.add(jtf_name);jtf3.add(lb_sex);jtf3.add(male);jtf3.add(female);jtf3.add(lb_ty);jtf3.add(ck_ty);jtf4.add(lb_bj);jtf4.add(cb_bj);jtf5.add(lb_desc);jtf5.add(txta_desc);setLayout(new BoxLayout(this.getContentPane(), BoxLayout.Y_AXIS));add(jtf);add(jtf2);add(jtf3);add(jtf4);add(jtf5);JPanel jp_submit = new JPanel();submit = new JButton("确定");jp_submit.add(submit);add(jp_submit);}}public class Experiment9_2{public static void main(String[] args){Framel f = new Framel();f.setLocation(200,100);f.setVisible(true);f.setTitle("实验6_2");f.setSize(250,300);f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}}实验三：import java.awt.GridLayout;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JTextField;class Frame3 extends JFrame{Frame3(){setLayout(new BoxLayout(this.getContentPane(),BoxLayout.Y_AXIS));JPanel jp1=new JPanel();JPanel jp2=new JPanel();JButton jb[]=new JButton[16];jp1.add(new JTextField(20));add(jp1);jp2.setLayout(new GridLayout(4,4,5,5));for(int i=0;i<10;i++)jb[i]=new JButton(""+i);jb[10] = new JButton(".");jb[11] = new JButton("1/x");jb[12] = new JButton("C");jb[13] = new JButton("√");jb[14] = new JButton("㎡");jb[15] = new JButton("㏒");for(int i=1;i<4;i++)jp2.add(jb[i]);jp2.add(jb[12]);for(int i=4;i<7;i++)jp2.add(jb[i]);jp2.add(jb[13]);for(int i=7;i<10;i++)jp2.add(jb[i]);jp2.add(jb[14]);jp2.add(jb[0]);jp2.add(jb[10]);jp2.add(jb[11]);jp2.add(jb[15]);add(jp2);setVisible(true);pack();setTitle("实验6-3");setLocation(300,400);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}public static void main(String[] args){new Frame3();}}。