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在Java Swing应用中，JTable是一个非常常用的组件，用于展示二维数据表格。有时，我们可能需要在JTable的某一列中添加自定义的按钮，以便为用户提供更多的交互功能。本篇将详细介绍如何在JTable列中自定义Button，并...

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你好，看起来这是一个实现简单计算器的 Java Swing 程序。程序界面有一个文本框和一些按钮，可以进行加减乘除等基本运算。程序中的 JTextField 组件 field 用于输入数字，每当用户点击一个按钮时，程序会读取 ...

优化这段代码import javax.swing.; import java.awt.; class Calculator { public void init() { JFrame f=new JFrame("计算器"); f.setSize(400,200); f.setVisible(true); f.setLocationRelativeTo(null); JPanel p=new JPanel(new GridLayout(6,4,4,4)); p.setBackground(Color.white); JTextField tf=new JTextField(100); tf.setBorderLayout.NORTH; p.add(tf); JButton button1=new JButton(" % "); JButton button2=new JButton(" CE "); JButton button3=new JButton(" C "); JButton button4=new JButton(" ← "); JButton button5=new JButton(" 1/X "); JButton button6=new JButton(" X2 "); JButton button7=new JButton(" 2√X "); JButton button8=new JButton(" ÷ "); JButton button9=new JButton(" 7 "); JButton button10=new JButton(" 8 "); JButton button11=new JButton(" 9 "); JButton button12=new JButton(" × "); JButton button13=new JButton(" 4 "); JButton button14=new JButton(" 5 "); JButton button15=new JButton(" 6 "); JButton button16=new JButton(" - "); JButton button17=new JButton(" 1 "); JButton button18=new JButton(" 2 "); JButton button19=new JButton(" 3 "); JButton button20=new JButton(" + "); JButton button21=new JButton("+/-"); JButton button22=new JButton(" 0 "); JButton button23=new JButton(" . "); JButton button24=new JButton(" = "); button24.setBackground(Color.blue); f.add(p); p.add(button1);p.add(button2);p.add(button3);p.add(button4);p.add(button5); p.add(button6);p.add(button7);p.add(button8);p.add(button9);p.add(button10); p.add(button11);p.add(button12);p.add(button13);p.add(button14);p.add(button15); p.add(button16);p.add(button17);p.add(button18);p.add(button19);p.add(button20); p.add(button21);p.add(button22);p.add(button23);p.add(button24); } } public class TestCalculator { public static void main(String[] args) { new Calculator().init(); } }

private void addButton(JPanel panel, String text) { JButton button = new JButton(text); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //...

public Calculator() { super("Calculator"); this.setLocationRelativeTo(null);// set up window this.setResizable(false); this.setDefaultCloseOperation(EXIT_ON_CLOSE); this.setSize(600, 200); result = new JPanel(); answer = 0.0 ; show = new JLabel(Double.toString(answer), SwingConstants.RIGHT);// let the result at the right of the field result.add(show); JTextField input = new JTextField(Double.toString(answer));// setup the size of the text field input.setColumns(6); input.setHorizontalAlignment(JTextField.RIGHT); button = new JPanel(); button.setLayout(new GridLayout(1, 5)); CLR = new JButton("CLR");// add the buttons of calculation. add = new JButton("+"); minus = new JButton("-"); Multiply = new JButton(""); divide = new JButton("/"); button.add(CLR); button.add(add); button.add(minus); button.add(Multiply); button.add(divide); CLR.addActionListener(e -> {// clear answer = 0.0; show.setText(Double.toString(answer)); field.setText(" "); }); add.addActionListener(e -> {// add number = field.getText(); if (!number.equals(null)) { double value = Double.parseDouble(number); answer += value; show.setText(Double.toString(answer)); field.setText(""); } }); minus.addActionListener(e -> {// minus number = field.getText(); if (!number.equals("")) { double value = Double.parseDouble(number); answer -= value; show.setText(Double.toString(answer)); field.setText(""); } }); Multiply.addActionListener(e -> {// multiply number = field.getText(); if (!number.equals("")) { double value = Double.parseDouble(number); answer = value; show.setText(Double.toString(answer)); field.setText(""); } }); divide.addActionListener(e -> {// divide number = field.getText(); if (!number.equals("")) { double value = Double.parseDouble(number); answer /= value; show.setText(Double.toString(answer)); field.setText(""); } }); add(button); add(field); add(result); this.setLayout(new GridLayout(3, 1)); this.setVisible(true); }错哪了

这段代码似乎是一个简单的计算器程序，但是在代码中没有定义 field 变量，因此在添加 field 变量时，需要先进行定义。此外，在 Multiply 和 divide 的实现中，没有对除数为0的情况进行处理，这会导致程序抛...

JButton addButton = new JButton("Add Club"); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { showAddClubDialog(); } });

这段代码创建了一个JButton实例对象addButton，用于显示"Add Club"文本的按钮。接着，为该按钮添加了一个ActionListener监听器，用于监听按钮的Action事件。当用户点击按钮时，会触发Action事件，执行ActionListener...

帮我补充这段代码便签管理部分的代码框架： import javax.swing.; import java.awt.; import java.awt.event.*; public class Memo extends JFrame { private JTextField titleField; private JTextArea contentArea; private JTextField timeField; private JButton addButton; private JButton editButton; private JButton deleteButton; private JButton viewButton; private JList memoList; private DefaultListModel listModel; public Memo() { // 初始化界面和组件 // 添加事件监听器 // 实现添加、编辑、删除和查看便签信息的功能 } public static void main(String[] args) { Memo memo = new Memo(); memo.setVisible(true); } }

private JButton addButton; private JButton editButton; private JButton deleteButton; private JButton viewButton; private JList memoList; private DefaultListModel listModel; public Memo() { //...

public class InterfaceCallExample extends JFrame implements ActionListener { private static final long serialVersionUID = 1L; private JButton callButton; private JTable resultTable; private DefaultTableModel tableModel; public InterfaceCallExample() { super("Interface Call Example"); setSize(400, 300); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); callButton = new JButton("查看数据"); callButton.addActionListener(this); panel.add(callButton); add(panel, BorderLayout.NORTH); tableModel = new DefaultTableModel(); tableModel.addColumn("id"); tableModel.addColumn("材料类型"); tableModel.addColumn("状态"); tableModel.addColumn("创建时间"); tableModel.addColumn("更改时间"); resultTable = new JTable(tableModel); add(new JScrollPane(resultTable), BorderLayout.CENTER); } public static void main(String[] args) { InterfaceCallExample example = new InterfaceCallExample(); example.setVisible(true); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == callButton) { try { URL url = new URL("http://101.34.120.182:8081/wnapp/productType/getTypeId?category=1&status=0&type="); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); String s = reader.readLine(); JSONObject jsonObject = new JSONObject(); JSONObject object = JSONObject.parseObject(s); Object o = object.get("data"); JSONObject object1 = JSONObject.parseObject(o.toString()); ArrayList<Map<String,Object>> list = (ArrayList<Map<String,Object>>) object1.get("list"); for (Map<String,Object> map : list){ String id = map.get("id").toString(); String titleName = map.get("titleName").toString(); String status = map.get("status").toString(); String createTime = map.get("createTime").toString(); String updateTime = map.get("updateTime").toString(); ArrayList<String> strings = new ArrayList<>(); strings.add(id); strings.add(titleName); strings.add(status); strings.add(createTime); strings.add(updateTime); String[] data = strings.toString().replace("[","").replace("]","").split(","); tableModel.addRow(data); } reader.close(); } catch (Exception ex) { ex.printStackTrace(); } } } } 添加一个新增数据的功能按钮，点击新增时可以输入对应的数据

addButton = new JButton("新增数据"); addButton.addActionListener(this); panel.add(addButton); //... } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == callButton) { /...

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callButton = new JButton("查看数据"); callButton.addActionListener(this); panel.add(callButton); JLabel categoryLabel = new JLabel("材料类型："); categoryField = new JTextField(10); JLabel ...

private JButton callButton; private JTable resultTable; private DefaultTableModel tableModel; public InterfaceCallExample() { super("Interface Call Example"); setSize(400, 300); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); callButton = new JButton("查看数据"); callButton.addActionListener(this); panel.add(callButton); add(panel, BorderLayout.NORTH); tableModel = new DefaultTableModel(); tableModel.addColumn("id"); tableModel.addColumn("材料类型"); tableModel.addColumn("状态"); tableModel.addColumn("创建时间"); tableModel.addColumn("更改时间"); tableModel.addColumn("操作"); resultTable = new JTable(tableModel); add(new JScrollPane(resultTable), BorderLayout.CENTER); } 如何在操作那一列的每条数据后面加上删除按钮

callButton = new JButton("查看数据"); callButton.addActionListener(this); panel.add(callButton); add(panel, BorderLayout.NORTH); tableModel = new DefaultTableModel(); tableModel.addColumn("id")...

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button3.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JFileChooser fileChooser = new JFileChooser("d://"); fileChooser.setFileSelectionMode...

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