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所以即時自學Java並遇到了一些麻煩。對於其中一項練習,下面是我無法理解的說明。任何幫助解釋將不勝感激。這是我對我遇到麻煩的部分的嘗試。用於GUI應用程序的JPanel
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class ButtonPanel extends JPanel {
public ButtonPanel(JButton[] buttons, JTextArea textArea) {
//TODO: Create a sub-panel with a 4 row, 3 column GridLayout
setLayout(new GridLayout(4,3)); //Layout of subPanel1
JButton b1 = new JButton ("A");
JButton b2 = new JButton ("B");
JButton b3 = new JButton ("C");
JButton b4 = new JButton ("1");
JButton b5 = new JButton ("2");
JButton b6 = new JButton ("3");
JButton b7 = new JButton ("X");
JButton b8 = new JButton ("Y");
JButton b9 = new JButton ("Z");
add(b1);
add(b2);
add(b3);
add(b4);
add(b4);
add(b5);
//TODO: Populate the grid with buttons
//TODO: Add the grid panel to this panel
//TODO: Create a JScrollPane containing textArea
JButton cr = new JButton();
//TODO: Set the preferred size of the scroll pane to 80x120
setPreferredSize (new Dimension(80, 120));
//TODO: Add the scroll pane to this panel
}
}
的研究5分鐘將清除所有的疑慮 – 2013-04-25 23:01:12
有什麼問題的時候? – 2013-04-25 23:02:45
創建JPanel的新實例,將按鈕添加到此面板,將此面板添加到父窗格 – MadProgrammer 2013-04-25 23:15:21