javaGUI….笔记 了解即可。。。
Frame f=new Frame("hello world");
f.setLayout(new FlowLayout());//给窗体添加流式布局
import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class FrameDemo {
public static void main(String[] args) {
Frame f=new Frame("hello world.");
f.setLayout(new FlowLayout());
f.setBounds(400, 200, 400, 300);
TextField tf=new TextField(20);
Button bu=new Button("数据转移");
bu.setSize(20,10);
TextArea ta=new TextArea(10,40);
f.add(tf);
f.add(bu);
f.add(ta);
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
bu.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String tf_str=tf.getText();
tf.setText("");
ta.append(tf_str+"\r\n");
//获取光标
tf.requestFocus();
}
});
f.setVisible(true);
}
}
package cn.yifei_02;
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class FrameDemo2 {
public static void main(String[] args) {
Frame f=new Frame("hello world.");
f.setLayout(new FlowLayout());
f.setBounds(400, 200, 400, 300);
Button redButton=new Button("红色");
f.add(redButton);
//设置窗体关闭
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
//对按钮添加动作事件
// redButton.addActionListener(new ActionListener() {
// @Override
// public void actionPerformed(ActionEvent e) {
// f.setBackground(Color.RED);
// }
// });
//添加鼠标点击事件
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
f.setBackground(Color.red);
}
});
//添加鼠标进入事件
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
f.setBackground(Color.red);
}
@Override
public void mouseExited(MouseEvent e) {
f.setBackground(Color.white);
}
});
f.setVisible(true);
}
}
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class FrameDemo3 {
public static void main(String[] args) {
Frame f=new Frame("hello world.");
f.setLayout(new FlowLayout());
f.setBounds(400, 200, 400, 300);
Label label=new Label("只能输入数字啊!");
TextField textField=new TextField(40);
f.add(label);
f.add(textField);
//键盘监听事件
textField.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
char ch=e.getKeyChar();
if(!(ch>='0' && ch<='9')){
e.consume();//使此事件不发生
}
}
});
//设置窗体关闭
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.setVisible(true);
}
}
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
public class FrameDemo4 {
public static void main(String[] args) {
Frame f = new Frame("多级菜单");
f.setLayout(new FlowLayout());
f.setBounds(400, 200, 400, 300);
String name = f.getTitle();
// 菜单栏
MenuBar mb = new MenuBar();
// 菜单
Menu m1 = new Menu("文件");
Menu m2 = new Menu("更改名称");
// 菜单项
MenuItem mi1 = new MenuItem("好好学习");
MenuItem mi2 = new MenuItem("天天向上");
MenuItem mi3 = new MenuItem("恢复标题");
MenuItem mi4 = new MenuItem("打开记事本");
MenuItem mi = new MenuItem("退出系统");
m2.add(mi1);
m2.add(mi2);
m2.add(mi3);
m1.add(m2);
m1.add(mi4);
m1.add(mi);
mb.add(m1);
f.setMenuBar(mb);
mi4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Runtime r = Runtime.getRuntime();
try {
r.exec("notepad");
} catch (IOException e1) {
e1.printStackTrace();
}
}
});
mi1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
f.setTitle(mi1.getLabel());
}
});
mi2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
f.setTitle(mi2.getLabel());
}
});
mi3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
f.setTitle(name);
}
});
mi.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
// 设置窗体关闭
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.setVisible(true);
}
}
public class UiUtil{
private UiUtil(){}
//修改窗体的图标
public static void setFrameImage(JFrame jf){
//获取工具类对象
Toolkit tk=Toolkit.getDefaultToolkit();
//根据路径获取图片
Image i=tk.getImage("src\\cn\\yifei\\1.jpg");
//给窗体设置图片
jf.setIconImage(i);
}
//设置窗体居中
public static void setFrameCenter(JFrame jf){
Toolkit tk=Toolkit.getDefaultToolkit();
//获取屏幕宽高
Dimension d=tk.getScreenSize();
double srceenWidth=d.getWidth();
double srceenHeight=d.getHeight();
//获取窗体宽高
int frameWidth=jf.getWidth();
int frameHeght=jf.getHeight();
//获取新的宽高
int width=(srceenWidth-frameWidth)/2;
int height=(srceenHeight-frameHeght)/2;
//设置窗体坐标
jf.setLocation(width,height);
}
}
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