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#2
林月儿2015-11-16 07:33
 程序代码：public class Wenbenkuang extends Panel implements TextListener { /** * */ private static final long serialVersionUID = 1L; static JFrame ff; static Label l1, l2,l3; static TextField t1,t2,t3; static int i; static String str; static float ft; public void test() { l1=new Label("请输入整数："); t1=new TextField(""); t1.addTextListener(this); ff.add(l1);ff.add(t1); l2=new Label("请输入字符串："); t2=new TextField(""); t2.addTextListener(this); ff.add(l2);ff.add(t2); l3=new Label("请输入浮点数："); t3=new TextField(""); t3.addTextListener(this); ff.add(l3);ff.add(t3); } @Override public void paint(Graphics g) { g.setColor(Color.WHITE); g.fillRect(0, 0, 200, 200); g.setColor(Color.BLACK); g.drawString("整形数："+Wenbenkuang.i,20,20); g.drawString("字符串："+Wenbenkuang.str, 20, 40); g.drawString("浮点数: "+Wenbenkuang.ft, 20, 60); } @Override public void textValueChanged(TextEvent evt) { try{ i=Integer.parseInt(t1.getText()); str=t2.getText(); ft=(Float.valueOf(t3.getText())).floatValue(); }catch(NumberFormatException e){ } repaint(); } public static void main(String[] args) { ff=new JFrame("我的窗口"); ff.setLayout(new GridLayout(4, 2)); Wenbenkuang wenben=new Wenbenkuang(); wenben.test(); ff.add(wenben); ff.setSize(400, 400); ff.setLocation(400, 200); ff.setVisible(true); } } |
import java.awt.*;
//import javax.swing.*;
import java.awt.event.*;
public class Wenbenkuang extends Frame implements WindowListener,ActionListener,TextListener
{
Label l1,l2,l3;
TextField t1,t2,t3;
int i;
String str;
float ft;
public Wenbenkuang()
{
Frame ff=new Frame("我的窗口");
ff.setSize(400, 800);
ff.setLocation(400, 400);
l1=new Label("请输入整数：");
t1=new TextField("0",30);
ff.add(l1);
ff.add(t1);
t1.addTextListener(this);
l2=new Label("请输入字符串：");
t2=new TextField(" ",30);
ff.add(l2);
ff.add(t2);
t2.addTextListener(this);
l3=new Label("请输入浮点数：");
t3=new TextField(" ",30);
ff.add(l3);
ff.add(t3);
t3.addTextListener(this);
ff.addWindowListener(this);
ff.setLayout(new FlowLayout());
ff.setVisible(true);
}
public void windowClosing(WindowEvent e)
{
Window ww=(Window)e.getSource();
ww.setVisible(false);
ww.dispose();
}
public void actionPerformed(ActionEvent e)
{
i=Integer.parseInt(t1.getText());
str=t2.getText();
ft=(Float.valueOf(t3.getText())).floatValue();
repaint();
}
public void paint(Graphics g)
{
g.drawString("整形数："+this.i,20,120);
g.drawString("字符串："+this.str, 20, 150);
g.drawString("浮点数: "+this.ft, 20, 180);
}
public void textValueChanged(TextEvent t)
{
}
public static void main(String[] args)
{
Wenbenkuang w1=new Wenbenkuang();
}
@Override
public void windowActivated(WindowEvent e) {
// TODO 自动生成的方法存根
}
@Override
public void windowClosed(WindowEvent e) {
// TODO 自动生成的方法存根
}
@Override
public void windowDeactivated(WindowEvent e) {
// TODO 自动生成的方法存根
}
@Override
public void windowDeiconified(WindowEvent e) {
// TODO 自动生成的方法存根
}
@Override
public void windowIconified(WindowEvent e) {
// TODO 自动生成的方法存根
}
@Override
public void windowOpened(WindowEvent e) {
// TODO 自动生成的方法存根
}
}
我只是想让三个文本框里的内容一块显示出来