这周主要是学习了监听器还有制作记事本，主要可以由一下代码来体现(把书上代码集合的)
监听器
实验代码
package text12;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Panel;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Vector;
import javax.swing.*;
public class Text12 extends JFrame implements ItemListener/* KeyListener,MouseListener*/ {
JTextArea ta;
JScrollPane sp;
JRadioButton pb,pb1,pb2;
ButtonGroup group;
JLabel la,la1;
JPanel pane;
JCheckBox cb,cb1;
Container con;
JList list,list1;
String tv[] = {"美剧","韩剧","日剧","泰剧","港剧"};
Vector<String> v;
public Text12() {
this.setTitle("监听器");
v=new Vector<String>();
v.add("男");
v.add("女");
list=new JList(tv);
list1=new JList(v);
list.setBorder(BorderFactory.createTitledBorder("喜欢看哪个国家的剧"));
list1.setBorder(BorderFactory.createTitledBorder("性别"));
list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
list1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
con=this.getContentPane();
cb=new JCheckBox("舒畅");
cb1=new JCheckBox("杨蓉");
pane=new JPanel(new FlowLayout(FlowLayout.LEFT));
pane.setBorder(BorderFactory.createTitledBorder("调查表"));
la=new JLabel("最喜欢的男明星是： ");
la1=new JLabel("最喜欢的女明星是： ");
pb=new JRadioButton("朱一龙");
pb1=new JRadioButton("肖战");
pb2=new JRadioButton("邓伦");
group=new ButtonGroup();
group.add(pb);
group.add(pb1);
group.add(pb2);
pane.add(la);
pane.add(pb);
pane.add(pb1);
pane.add(pb2);
pane.add(la1);
pane.add(cb);
pane.add(cb1);
pane.add(list);
pane.add(list1);
pb.addItemListener(this);
pb1.addItemListener(this);
pb2.addItemListener(this);
con.add(pane);
// ta=new JTextArea(4,5);
// sp=new JScrollPane(ta,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// ta.addKeyListener(this);
// ta.addMouseListener(this);
this.pack();
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setVisible(true);
}
public static void main(String[] args) {
new Text12();
}
@Override
public void itemStateChanged(ItemEvent e) {
if(e.getSource()==pb) {
System.out.println(pb.getText());
}
}
/* @Override
public void keyTyped(KeyEvent e) {
ta.append(e.getKeyChar()+"\n");
}
@Override
public void keyPressed(KeyEvent e) {
ta.append(e.getKeyCode()+"\n");
}
@Override
public void keyReleased(KeyEvent e) {
ta.append(KeyEvent.getKeyText(e.getKeyCode())+"\n");
}
@Override
public void mouseClicked(MouseEvent e) {
int c=e.getButton();
String mouse;
if(c==MouseEvent.BUTTON1) {
mouse="左键";
}else if(c==MouseEvent.BUTTON3){
mouse="右键";
}else {
mouse="中键";
}
ta.append(mouse);
}
@Override
public void mousePressed(MouseEvent e) {
int a=e.getClickCount();
ta.append(a+"\n");
}
@Override
public void mouseReleased(MouseEvent e) {
String str=MouseEvent.getMouseModifiersText(WIDTH);
ta.append(str);
}
@Override
public void mouseEntered(MouseEvent e) {
int x=e.getX();
int y=e.getY();
ta.append("("+x+","+y+")");
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
*/
}
记事本
package jishiben;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.swing.*;
import javax.swing.undo.UndoManager;
public class Jishiben implements ActionListener{
JFrame frame;
JTextArea text;
JScrollPane sp;
JMenuItem newItem,windomItem,openItem,saveItem,othersaveItem,pagesetupItem,printItem,closeItem;
JMenuBar bar;
JMenu fileMenu,editMenu,formatMenu,checkMenu,helpMenu;
JFileChooser choose;
File file;
JTable table;
JMenuItem blankItem;
UndoManager undoManager;
public void Wenjian() {
frame=new JFrame("记事本");
text=new JTextArea();
sp=new JScrollPane(text);
bar=new JMenuBar();
fileMenu=new JMenu("文件(F)");
editMenu=new JMenu("编辑(E)");
formatMenu=new JMenu("格式(O)");
checkMenu=new JMenu("查看(V)");
helpMenu=new JMenu("帮助(H)");
//关于文件的选项
newItem=new JMenuItem("新建(N)");
windomItem=new JMenuItem("新窗口(W)");
openItem=new JMenuItem("打开(O)");
saveItem=new JMenuItem("保存(S)");
othersaveItem=new JMenuItem("另存为(A)");
pagesetupItem=new JMenuItem("页面设置(U)");
printItem=new JMenuItem("打印(P)");
closeItem=new JMenuItem("退出(X)");
//关于文件助记符的设置
newItem.setMnemonic('N');
windomItem.setMnemonic('W');
openItem.setMnemonic('O');
saveItem.setMnemonic('S');
othersaveItem.setMnemonic('A');
pagesetupItem.setMnemonic('U');
printItem.setMnemonic('P');
closeItem.setMnemonic('X');
//关于文件快捷键的设置
newItem.setAccelerator(KeyStroke.getKeyStroke('N',KeyEvent.CTRL_DOWN_MASK));
windomItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_DOWN_MASK|InputEvent.SHIFT_DOWN_MASK));
openItem.setAccelerator(KeyStroke.getKeyStroke('O',KeyEvent.CTRL_DOWN_MASK));
saveItem.setAccelerator(KeyStroke.getKeyStroke('S',KeyEvent.CTRL_DOWN_MASK));
othersaveItem.setAccelerator(KeyStroke.getKeyStroke('S',KeyEvent.CTRL_DOWN_MASK|KeyEvent.SHIFT_DOWN_MASK));
printItem.setAccelerator(KeyStroke.getKeyStroke('P',KeyEvent.CTRL_DOWN_MASK));
//关于文件菜单的动作监听
newItem.addActionListener(this);
windomItem.addActionListener(this);
openItem.addActionListener(this);
saveItem.addActionListener(this);
othersaveItem.addActionListener(this);
pagesetupItem.addActionListener(this);
printItem.addActionListener(this);
closeItem.addActionListener(this);
//向菜单栏添加
bar.add(fileMenu);
bar.add(editMenu);
bar.add(formatMenu);
bar.add(checkMenu);
bar.add(helpMenu);
frame.add(sp);
frame.setJMenuBar(bar);
frame.setSize(400,300);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
Jishiben shi=new Jishiben();
shi.Wenjian();
}
public void actionPerformed(ActionEvent e){
//关于文件下面选项的监听
if(e.getSource()==newItem) {
text.setText("");
}else if(e.getSource()==windomItem) {
Jishiben ben =new Jishiben();
ben.Wenjian();
}else if(e.getSource()==openItem) {
choose=new JFileChooser();
choose.showOpenDialog(null);
file=choose.getSelectedFile();
try {
FileInputStream input=new FileInputStream(file);
byte[] b=new byte[input.available()];
input.read(b);
text.append(new String(b));
input.close();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}else if(e.getSource()==othersaveItem) {
choose=new JFileChooser();
choose.showOpenDialog(null);
file=choose.getSelectedFile();
try {
if(!file.exists()) {
file.createNewFile();
}
FileOutputStream output=new FileOutputStream(file);
byte[] b=text.getText().getBytes();
output.write(b);
output.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}else if(e.getSource()==saveItem) {
choose=new JFileChooser();
choose.showOpenDialog(null);
file=choose.getSelectedFile();
try {
FileOutputStream output=new FileOutputStream(file);
byte[] b=text.getText().getBytes();
output.write(b);
output.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}else if(e.getSource()==pagesetupItem) {
}else if(e.getSource()==printItem) {
}else if(e.getSource()==closeItem) {
System.exit(1);
}
}
}
主要学习监听器及各种事件处理
1）键盘监听
使用KeyListener接口
2）鼠标监听
使用MouseListener接口，其中MouseEvent中有getButton（），getX（），getY（）等方法
3）单选钮：JRadioButton及事件处理
方法：
setSelected（）；是否被选中
setText（String）；设置显示文本
setIcon（Icon）；设置图片
其事件处理使用ItenListener
4）复选框：JCheckBoxji事件处理
方法：
JCheckBox（）；创建文本对象
其事件处理也是用ItemListener接口
5）列表框：JList及事件处理
方法：
int[] getSeletrdIndices（）；返回所选择的所有数组
Jlist（ListModel/Object[] listData/Vector<?>listData）；构造JList
其事件处理使用ListSelectionListener接口
菜单组件
JMenu、JMenuBar、JMenuItem可实现简单的菜单外观，使用事件监听可对应作出一些功能的实现，如代码记事本
