文本框、按钮、文本域
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;
public class FrameDemo {
public static void main(String[] args) {
// 创建窗体对象
Frame f = new Frame();
// Frame ff = new Frame("ahahahah") 构造给窗体标题
// 设置窗体标题
f.setTitle("hahahaha");
// 调节窗口大小
f.setSize(500, 500);
// 设置窗口位置
// f.setLocation(400,200);
// f.setBounds(x, y, width, height);
// 设置窗口居中
f.setLocationRelativeTo(null);
// 流式布局
f.setLayout(new FlowLayout());
// 创建文本框
TextField tf = new TextField(20); // 可以存20个字符
// 创建按钮
Button bu = new Button("数据转移");
// 创建文本域
TextArea ta = new TextArea(10, 40);
// 组件添加到窗体
f.add(tf);
f.add(bu);
f.add(ta);
// 对按钮添加事件
bu.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
// 获取文本框的值
String tf_str = tf.getText().trim();
// 清空数据
tf.setText("");
// 设置给文本域
// ta.setText(tf_str);
// 字符串比较
if (tf_str.equals("123")) {
// 追加和换行
ta.append("123" + "\r\n");
} else
ta.append("输错了" + "\r\n");
// 获取光标
tf.requestFocus();
}
});
// 适配器改进窗口关闭
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
// 窗体可见
f.setVisible(true);
}
}
鼠标移动按钮更改背景颜色:
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
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;
public class FrameDemo2 {
public static void main(String[] args) {
//创建窗体
Frame f = new Frame("按钮颜色");
//大小
f.setSize(500, 400);
//居中
f.setLocationRelativeTo(null);
//流式布局
f.setLayout(new FlowLayout());
//设置按钮
Button redButton = new Button("红***utton greenButton = new Button("绿***utton blueButton = new Button("蓝色");
f.add(redButton);
f.add(greenButton);
f.add(blueButton);
//窗口关闭
f.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
});
//对按钮添加动作事件
// redButton.addActionListener(new ActionListener() {
// @Override
// public void actionPerformed(ActionEvent e) {
// // TODO Auto-generated method stub
// f.setBackground(Color.red);
// }
// });
//对按钮的单击事件
// redButton.addMouseListener(new MouseAdapter() {
// @Override
// public void mouseClicked(MouseEvent e) {
// // TODO Auto-generated method stub
// f.setBackground(Color.red);
// }
// });
//对按钮添加鼠标进入事件
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.red);
}
});
//对按钮添加离开事件
redButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.white);
}
});
//对按钮添加鼠标进入事件
greenButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.green);
}
});
//对按钮添加离开事件
greenButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.white);
}
});
//对按钮添加鼠标进入事件
blueButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.blue);
}
});
//对按钮添加离开事件
blueButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
f.setBackground(Color.white);
}
});
//窗体可见
f.setVisible(true);
}
}
文本框输入加限制:
import java.awt.FlowLayout;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
public class JframeDemo {
public static void main(String[] args) {
// Jframe 类创建窗口
JFrame jf = new JFrame("文本框");
//大小
jf.setSize(400, 400);
//居中
jf.setLocationRelativeTo(null);
//流式布局
jf.setLayout(new FlowLayout());
Label label = new Label("只能输入数字,不信你试试!");
//创建文本框
TextField tf = new TextField(30);
//加入窗体
jf.add(label);
jf.add(tf);
//窗口可关闭
jf.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//可见
jf.setVisible(true);
tf.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
char ch = e.getKeyChar();
if(!(ch>='0'&&ch<='9')) {
e.consume();
}
}
});
}
}
菜单
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
public class WIndowmenu extends JFrame{
//菜单条
JMenuBar menubar = new JMenuBar();
//创建菜单
JMenu menu = new JMenu("菜单");
JMenu subMenu = new JMenu("软件项目");
JMenuItem item,item2;
public WIndowmenu() {
}
@SuppressWarnings("deprecation")
public void init() {
setTitle("带菜单的窗口");
item = new JMenuItem("Java 话题",new ImageIcon("src\\menu\\aa.png"));
item2 = new JMenuItem("动画话题",new ImageIcon("src\\\\menu\\\\bb.png"));
// item.setAccelerator(KeyStroke.getKeyStroke('x'));
// item2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
menu.add(item);
menu.addSeparator();
menu.add(item2);
menu.add(subMenu);
subMenu.add(new JMenuItem("汽车销售系统",new ImageIcon("src\\\\menu\\\\cc.png")));
subMenu.add(new JMenuItem("农场信息系统",new ImageIcon("src\\\\menu\\\\dd.png")));
menubar.add(menu);
setJMenuBar(menubar);
setLocationRelativeTo(null);
setSize(400,300);
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
public static void main(String[] args) {
WIndowmenu indowmenu = new WIndowmenu();
indowmenu.init();
}
}