Question

swing 怎样处理JTable中单元格的焦点事件

Answer 1

你好，我这边直接给你贴一份用例吧，也许你用心看一下就懂了
也可以直接贴到你的eclipse里运行看下效果
祝你成功
public class Test {

//框架
private JFrame frame = null;

//面板
private JPanel pane = null;

//表格
private JTable table = null;

//表格模型
private Table_Model model = null;

//滚动窗格
private JScrollPane s_pan = null;

//按钮
private JButton button_1 = null, button_2 = null, button_3 = null;

public Test() {

frame = new JFrame("JTableTest");

pane = new JPanel();

button_1 = new JButton("清除数据");

button_1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

removeData();

}

});

button_2 = new JButton("添加数据");

button_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

addData();

}

});

button_3 = new JButton("保存数据");

button_3.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

saveData();

}

});

pane.add(button_1);

pane.add(button_2);

pane.add(button_3);

model = new Table_Model(20);

table = new JTable(model);

table.setBackground(Color.white);

String[] age = { "16", "17", "18", "19", "20", "21", "22" };

//TODO
JComboBox com = new JComboBox(age);

TableColumnModel tcm = table.getColumnModel();

tcm.getColumn(3).setCellEditor(new DefaultCellEditor(com));

tcm.getColumn(0).setPreferredWidth(50);

tcm.getColumn(1).setPreferredWidth(100);

tcm.getColumn(2).setPreferredWidth(50);

s_pan = new JScrollPane(table);

frame.getContentPane().add(s_pan, BorderLayout.CENTER);

frame.getContentPane().add(pane, BorderLayout.NORTH);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(300, 200);

frame.setVisible(true);

}

/**
* 添加数据
*/
private void addData() {

model.addRow("李逵", true, "19");

table.updateUI();

}

/**
* 清除数据
*/
private void removeData() {

model.removeRows(0, model.getRowCount());

table.updateUI();

}

/**
* 保存数据，暂时是将数据从控制台显示出来
*/
private void saveData() {

int col = model.getColumnCount();

int row = model.getRowCount();

for (int i = 0; i < col; i++) {

System.out.print(model.getColumnName(i) + "\t");

}

System.out.print("\r\n");

for (int i = 0; i < row; i++) {

for (int j = 0; j < col; j++) {

System.out.print(model.getValueAt(i, j) + "\t");

}

System.out.print("\r\n");

}

System.out.println("------------------------------------");

}

public static void main(String args[]) {

new Test();

System.out.println("按下保存按钮将会把JTable中的内容显示出来\r\n------------------------------------");

}
}

public class Table_Model extends AbstractTableModel {

private static final long serialVersionUID = -7495940408592595397L;

private Vector content = null;

private String[] title_name = { "ID", "姓名", "性别", "年龄" };

public Table_Model() {

content = new Vector();

}

public Table_Model(int count) {

content = new Vector(count);

}

public void addRow(String name, boolean sex, String age) {

Vector v = new Vector(4);

v.add(0, new Integer(content.size()));

v.add(1, name);

v.add(2, new Boolean(sex));

v.add(3, age);

content.add(v);

}

public void removeRow(int row) {

content.remove(row);

}

public void removeRows(int row, int count) {

for (int i = 0; i < count; i++) {

if (content.size() > row) {

content.remove(row);

}

}

}

/**
* 让表格中某些值可修改，但需要setValueAt(Object value, int row, int col)方法配合才能使修改生效
*/
public boolean isCellEditable(int rowIndex, int columnIndex) {

if (columnIndex == 0) {

return false;

}

return true;

}

/**
* 使修改的内容生效
*/
public void setValueAt(Object value, int row, int col) {

((Vector) content.get(row)).remove(col);

((Vector) content.get(row)).add(col, value);

this.fireTableCellUpdated(row, col);

}

public String getColumnName(int col) {

return title_name[col];

}

public int getColumnCount() {

return title_name.length;

}

public int getRowCount() {

return content.size();

}

public Object getValueAt(int row, int col) {

return ((Vector) content.get(row)).get(col);

}

/**
* 返回数据类型
*/
public Class getColumnClass(int col) {

return getValueAt(0, col).getClass();

}

}