?? frame1.java
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package ex10_03;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.util.*;public class Frame1 extends JFrame { JPanel contentPane; JButton jButton1 = new JButton(); JTextField jTextField1 = new JTextField(); JScrollPane jScrollPane1 = new JScrollPane(); JList jList1 = new JList(); JButton jButton2 = new JButton(); JLabel jLabel1 = new JLabel(); JLabel jLabel2 = new JLabel(); /**Construct the frame*/ public Frame1() { enableEvents(AWTEvent.WINDOW_EVENT_MASK); try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } /**Component initialization*/ private void jbInit() throws Exception { //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]"))); contentPane = (JPanel) this.getContentPane(); jButton1.setText("加入"); jButton1.setBounds(new Rectangle(158, 27, 79, 29)); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(ActionEvent e) { jButton1_actionPerformed(e); } }); contentPane.setLayout(null); this.setSize(new Dimension(400, 300)); this.setTitle("Frame Title"); this.addWindowListener(new java.awt.event.WindowAdapter() { public void windowOpened(WindowEvent e) { this_windowOpened(e); } }); jTextField1.setBounds(new Rectangle(31, 27, 112, 23)); jScrollPane1.setBounds(new Rectangle(32, 83, 110, 100)); jButton2.setText("刪除選項"); jButton2.setBounds(new Rectangle(150, 126, 88, 29)); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(ActionEvent e) { jButton2_actionPerformed(e); } }); jLabel1.setText("請輸入您喜歡吃的水果"); jLabel1.setBounds(new Rectangle(24, 5, 133, 19)); jLabel2.setText("您輸入的水果有:"); jLabel2.setBounds(new Rectangle(38, 62, 97, 19)); jList1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); contentPane.add(jButton1, null); contentPane.add(jTextField1, null); contentPane.add(jButton2, null); contentPane.add(jScrollPane1, null); contentPane.add(jLabel1, null); contentPane.add(jLabel2, null); jScrollPane1.getViewport().add(jList1, null); } /**Overridden so we can exit when window is closed*/ protected void processWindowEvent(WindowEvent e) { super.processWindowEvent(e); if (e.getID() == WindowEvent.WINDOW_CLOSING) { System.exit(0); } } //建立Vector對象來記錄待選項目 Vector myvector = new Vector(); void this_windowOpened(WindowEvent e) {//添加向量對象的元素myvector.addElement("芭蕉");myvector.addElement("香蕉");//將向量對象內的元素加入jList組件中成為待選項目jList1.setListData(myvector); } void jButton1_actionPerformed(ActionEvent e) {//加入文本框內的資料成為Vector對象的新元素myvector.addElement(jTextField1.getText());//重新定義jList組件內的待選項目jList1.setListData(myvector); } void jButton2_actionPerformed(ActionEvent e) {int index;//取回jList組件中被選取的項目索引index=jList1.getSelectedIndex();if (index>=0) //先確認是否有選定項目{ //依項目索引刪除Vector對象內的元素 myvector.removeElementAt(index); //重新定義jList組件內的待選項目 jList1.setListData(myvector);} }}
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