Enter Key as Java Application Form Submission - JFrame

Question

我想在一個Java應用程序中按「Enter」鍵時提交一個示例代碼以提交一個文本字段。

我使用的JFrame和下面的代碼：

package com.sh.st; 

import java.awt.Color; 
import java.awt.GridLayout; 
import java.awt.event.KeyEvent; 

import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 




public class SearchScreen extends JFrame{ 

    JButton btsearch; 
    JLabel lbsearch; 
    JTextField txtsearch; 
    JPanel p1; 

    public SearchScreen(){ 

    //Button Creation 
    btsearch= new JButton("Search"); 


    //Label Creation 
    lbsearch= new JLabel("Type Keywords in english to be searched below:"); 


    //TextBox 
    txtsearch= new JTextField(); 


    //Pane Creation 
    p1=new JPanel(); 
    p1.setBackground(Color.gray); 

    //Pane Components 
    p1.add(lbsearch); 
    p1.add(txtsearch); 
    p1.add(btsearch); 

    btsearch.setEnabled(true); 

    //Adding JPaneel  
    getContentPane().add(p1); 

    //JFrame Setup 
    setSize(300,300); 
    setTitle("SHST"); 

    //JFrame Layout Setup 
    p1.setLayout(new GridLayout(3,3)); 


    btsearch.setMnemonic(KeyEvent.VK_ENTER); 

    } 

} 

但問題是，作爲一個虛擬的關鍵，我需要在同一時間「ALT」舉行，這是太unconfortable，而不是直觀一個用戶。

我試着在這裏看到很多頁面在堆棧和谷歌，但沒有人給我答案。我看到了一些命令，比如「addKeyListener」，但我現在無法做到我想要的。

感謝您的幫助

編輯[專題解決]：

package com.sh.st; 

import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.io.IOException; 

import javax.swing.AbstractAction; 
import javax.swing.Action; 
import javax.swing.JOptionPane; 
import javax.swing.KeyStroke; 


public class EventSearch extends SearchScreen{ 

    String query; 



    public EventSearch(){ 

     txtsearch.getInputMap().put(keyStroke, key); 
     txtsearch.getActionMap().put(key, enterAction); 


} 

    Action enterAction = new AbstractAction() { 
     @Override 
     public void actionPerformed(ActionEvent e) { 
      try { 

       HttpRequest http = new HttpRequest(CatchQuery()); 

       } catch (IOException e1) { 
       e1.printStackTrace(); //print failure 
       JOptionPane.showMessageDialog(null, "HTTP request failure."); 
      } 
     }}; 
    String key = "ENTER"; 
    KeyStroke keyStroke = KeyStroke.getKeyStroke(key); 



      public String CatchQuery(){ 
       query=txtsearch.getText(); 
       this.dispose(); 
       return query; 
      } 



} 

Answer 1

您可以使用KeyBindingsHow to use KeyBindings

下面是一段代碼

final JTextField textfield = new JTextField(); 
Action enterAction = new AbstractAction() { 
    @Override 
    public void actionPerformed(ActionEvent e) { 
     //do something 
    }}; 
String key = "ENTER"; 
KeyStroke keyStroke = KeyStroke.getKeyStroke(key); 
textfield.getInputMap().put(keyStroke, key); 
textfield.getActionMap().put(key, enterAction); 

Answer 2

物權法t將ActionListener添加到文本字段中：

//TextBox 
txtsearch = new JTextField(); 
txtsearch.addActionListener(new ActionListener() { 
    @Override 
    public void actionPerformed(ActionEvent e) { 
    // code when enter is pressed in text field 
    } 
});