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我正在學習Java swing庫,並創建了這個第一個簡單的Hello World示例,它在BorderLayout.CENTER區域中打印Hello World消息,並在周圍放置了一些按鈕。我需要做什麼才能將文本放置在Swing BorderLayout對象的中心?
這是我的代碼:
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JLabel;
import org.jdesktop.application.SingleFrameApplication;
public class Main extends SingleFrameApplication {
/*
@Override
protected void startup() {
// TODO Auto-generated method stub
show(new JLabel("Hello World"));
}
*/
public static void main(String[] args) {
Main a = new Main();
a.startup();
}
@Override protected void startup() {
/*
JLabel label = new JLabel();
label.setName("label");
show(label);
*/
JFrame frame = new JFrame("FrameDemo"); // Creo il frame e gli setto il titolo
/* What happens when the frame closes: EXIT_ON_CLOSE operation exits the program when your user closes the frame.
* Utile se il programma contiene un solo frame: chiudere il frame significa chiudere l'intera applicazione
*/
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel myLabel = new JLabel("Hello World !!!");
myLabel.setPreferredSize(new Dimension(600, 300));
// Ottengo il riquadro del contenuto e gli aggiungo la label creata in una determinata posizione:
frame.getContentPane().add(myLabel, BorderLayout.CENTER);
frame.getContentPane().add(new Button("North"), BorderLayout.NORTH);
frame.getContentPane().add(new Button("South"), BorderLayout.SOUTH);
frame.getContentPane().add(new Button("East"), BorderLayout.EAST);
frame.getContentPane().add(new Button("West"), BorderLayout.WEST);
//Display the window.
frame.pack();
frame.setVisible(true);
}
}
正如你所看到的BorderLayout.CENTER區左側的的Hello World消息出現。我需要做些什麼才能將此文本放在CENTER區域的中間?
TNX
安德烈