java控制页面焦点_java-如何在JTable中控制焦点

请尝试这个例子.

它应该让您输入上,下,左,右的值u,d,l,r来浏览表格.

希望这会给您一个有关如何做的想法.

import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;

import javax.swing.Action;

import javax.swing.JFrame;

import javax.swing.JTable;

import javax.swing.KeyStroke;

import javax.swing.table.DefaultTableModel;

import javax.swing.table.TableModel;

public class Test extends JFrame {

private JTable table;

private TableModel tableModel;

public Test() {

tableModel = new DefaultTableModel(5, 5);

table = new JTable(tableModel);

table.setColumnSelectionAllowed(true);

getContentPane().add(table);

Action handleEnter = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

table.getCellEditor().stopCellEditing(); // store user input

int row = table.getSelectedRow();

int col = table.getSelectedColumn();

String val = String.valueOf(table.getValueAt(row, col)).toLowerCase();

if (val.equals("u"))

--row;

else if (val.equals("d"))

++row;

else if (val.equals("l"))

--col;

else if (val.equals("r"))

++col;

if ( row >= 0 && row < tableModel.getRowCount()

&& col >= 0 && col < tableModel.getColumnCount()) {

table.changeSelection(row, col, false, false);

table.editCellAt(row, col);

}

}

};

// replace action for ENTER, since next row would be selected automatically

table.getInputMap().put(KeyStroke.getKeyStroke("ENTER"), "handleEnter");

table.getActionMap().put("handleEnter", handleEnter);

}

public static void main(String[] args) {

Test test = new Test();

test.setSize(800, 600);

test.setVisible(true);

}

}