Java JTextArea和JButton。将焦点设置在按钮上
下面的程序显示一个JTextArea和一个Close JButton。我将该按钮定义为默认按钮,因为我希望它在打开窗口时具有焦点。但是,当我运行程序时,按钮会高亮显示,但焦点在文本字段上 如何将焦点设置在按钮上而不是文本区域Java JTextArea和JButton。将焦点设置在按钮上,java,swing,focus,awt,jtextarea,Java,Swing,Focus,Awt,Jtextarea,下面的程序显示一个JTextArea和一个Close JButton。我将该按钮定义为默认按钮,因为我希望它在打开窗口时具有焦点。但是,当我运行程序时,按钮会高亮显示,但焦点在文本字段上 如何将焦点设置在按钮上而不是文本区域 package test; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.event.ActionEvent; im
package test;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;
import javax.swing.border.EtchedBorder;
public class Test {
static JPanel southPanel;
static JButton closeButton;
static JFrame frame;
static JTextArea textArea;
private static final Dimension REASON_AREA_SIZE = new Dimension(250, 50);
public static void main(String args[]) {
String title = "";
frame = new JFrame();
frame.setLayout(new BorderLayout());
frame.setSize(1000, 800);
textArea = new JTextArea();
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setEditable(true);
JScrollPane lScrollPane = new JScrollPane(textArea);
lScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
lScrollPane.setPreferredSize(REASON_AREA_SIZE);
frame.add(lScrollPane, BorderLayout.CENTER);
frame.add(createSouthPanel(), BorderLayout.SOUTH);
//Here the close button is defined by default, the focus should be on it
setDefaultButton();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setTitle(title);
frame.setVisible(true);
}
private static JPanel createSouthPanel() {
southPanel = new JPanel(
new FlowLayout(FlowLayout.RIGHT, 10, 10));
southPanel.setBorder(new EtchedBorder(EtchedBorder.RAISED));
addCloseButton(southPanel);
return southPanel;
}
/**
* Set the close button as default
*/
protected static void setDefaultButton() {
frame.getRootPane().setDefaultButton(closeButton);
}
private static void addCloseButton(JPanel pButtonsPanel) {
closeButton = new JButton("Close");
closeButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent pEvent) {
frame.dispose();
}
});
pButtonsPanel.add(closeButton);
}
}
在setDefaultButton方法中,添加:
closeButton.requestFocus()
焦点与默认值不同。问题是相同的,游标仍在JText区域中。我现在无法通过单击IDE前面的ENTER来关闭窗口,但请尝试“frame.getRootPane.closeButton.requestFocus”-我怀疑它找不到正确的关闭按钮。最后,如果我将其放在主函数的末尾,closeButton.requestFocus会起作用。谢谢