截至目前,当我运行该程序时,会打开两个不同的面板。一个是JPanel,一个是JFrame。我想知道如何将两者结合起来或者只是将JPLnel上的JLabel放在我已经拥有的JFrame上?
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
public class MainQuestions {
public static void main (String args[]){
JFrame frame=new JFrame();
setLayout(new BorderLayout());
JPanel labelPanel = new JPanel();
labelPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
JLabel bottomRtLabel = new JLabel("BOTTOM RIGHT LABEL");
labelPanel.add(bottomRtLabel);
frame.add(labelPanel,BorderLayout.SOUTH);
frame.setVisible(true);
Object ARRAY[]={"French","English","Portugese","Spanish"};
String answer=(String)JOptionPane.showInputDialog(frame, "What language predominately spoken in Latin American countries?","World Geography Review", JOptionPane.PLAIN_MESSAGE, null, ARRAY, null);
if (answer==null)
{
//System.exit(0);
}
else if (answer.equals("Spanish"))
{
JOptionPane.showMessageDialog(null, "Correct!", "World Geography Review", JOptionPane.PLAIN_MESSAGE,null);
//System.exit(0);
}
else
{
JOptionPane.showMessageDialog(null, "Sorry, wrong answer.", "World Geography Review", JOptionPane.PLAIN_MESSAGE,null);
//System.exit(0);
}
}
private static void setLayout(BorderLayout borderLayout) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分:1)
我在你的代码中发现了很多错误。对于开始:
JFrame frame=new JFrame();
setLayout(new BorderLayout());
应该是:
JFrame frame=new JFrame();
frame.setLayout(new BorderLayout());
此外,您可能希望将所有代码移动到构造函数。所以你的主要看起来像这样:
public static void main (String args[]){
new MainQuestions();
}
然后在构造函数中移动所有代码:
public MainQuestions(){
JFrame frame=new JFrame();
frame.setLayout(new BorderLayout());
JPanel labelPanel = new JPanel();
labelPanel.setLayout(new FlowLayout(FlowLayout.RIGHT)); // Read up on GridBagLayout
JLabel bottomRtLabel = new JLabel("BOTTOM RIGHT LABEL");
labelPanel.add(bottomRtLabel);
frame.add(labelPanel,BorderLayout.SOUTH);
frame.setVisible(true);
String ARRAY[]={"French","English","Portugese","Spanish"}; // Notice how I changed the type to String
String answer=(String)JOptionPane.showInputDialog(frame, "What language predominately spoken in Latin American countries?","World Geography Review", JOptionPane.PLAIN_MESSAGE, null, ARRAY, null);
if (answer==null)
{
//code
}
else if (answer.equals("Spanish"))
{
JOptionPane.showMessageDialog(null, "Correct!", "World Geography Review", JOptionPane.PLAIN_MESSAGE,null);
}
else
{
JOptionPane.showMessageDialog(null, "Sorry, wrong answer.", "World Geography Review", JOptionPane.PLAIN_MESSAGE,null);
}
System.exit(0);
}
}
我还没有运行这个编辑过的代码。通过自己输入并调试来试试。
答案 1 :(得分:1)
您可以扩展JPanel。像这样:
public class MainQuestions {
public static void main (String args[]){
JFrame frame=new JFrame();
YourClass labelPanel = new YourClass();
frame.setLayout(new BorderLayout());
frame.add(labelPanel,BorderLayout.SOUTH);
setVisible(true);
}
class YourClass extends JPanel {
YourClass(){
//add label there
}
}