我正在为一家模拟披萨公司编写一个程序,当我运行我的代码时,我得到一个BoxLayout无法共享错误。我是布局管理员的新手,并且只使用Flow优先。
当时我正在使用这种方法,我将下面的其他课程包括在内,但是如果你需要了解更多,请告诉我。
/***** Pizza Method *****/
private JPanel Pizza() {
/*Creates Pizza Panel*/
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JPanel center = new JPanel();
center.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
/*Buffer Panel*/
JPanel buffer = new JPanel();
buffer.setPreferredSize(new Dimension(20, 30));
/*Title*/
JLabel title = new JLabel("Signature Pizzas: ");
/*** Pizzas ***/
JLabel pepperoni = new JLabel("Pepperoni = Good Ol' Cheese and Pepperoni ----- $5");
JLabel allAmerican = new JLabel("All American = Pepperoni, Ground Beef,"
+ " Ham, and Bacon with American Cheese ----- $10");
/*** Add Components ***/
center.add(pepperoni);
center.add(Box.createVerticalGlue());
center.add(allAmerican);
panel.add(title, BorderLayout.NORTH);
panel.add(buffer, BorderLayout.WEST);
panel.add(new JPanel(), BorderLayout.SOUTH);
panel.add(center, BorderLayout.CENTER);
return panel;
}
这是班级
package pizza;
import java.awt.*;
import javax.swing.*;
public class SigDishPanel extends JPanel {
public SigDishPanel() {
/*** Set Defaults***/
setLayout(new GridLayout(2, 1));
setBackground(Color.ORANGE);
/*** Adds Pizza and Drinks Panels ***/
add(Pizza());
add(Drinks());
}
/***** Pizza Method *****/
private JPanel Pizza() {
/*Creates Pizza Panel*/
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JPanel center = new JPanel();
center.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
/*Buffer Panel*/
JPanel buffer = new JPanel();
buffer.setPreferredSize(new Dimension(20, 30));
/*Title*/
JLabel title = new JLabel("Signature Pizzas: ");
/*** Pizzas ***/
JLabel pepperoni = new JLabel("Pepperoni = Good Ol' Cheese and Pepperoni ----- $5");
JLabel allAmerican = new JLabel("All American = Pepperoni, Ground Beef,"
+ " Ham, and Bacon with American Cheese ----- $10");
/*** Add Components ***/
center.add(pepperoni);
center.add(Box.createVerticalGlue());
center.add(allAmerican);
panel.add(title, BorderLayout.NORTH);
panel.add(buffer, BorderLayout.WEST);
panel.add(new JPanel(), BorderLayout.SOUTH);
panel.add(center, BorderLayout.CENTER);
return panel;
}
/***** Drinks Method *****/
private JPanel Drinks() {
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JPanel buffer = new JPanel();
buffer.setPreferredSize(new Dimension(20, 30));
JLabel title = new JLabel("Signature Beverages: ");
/*** Drinks ***/
JLabel bearBrew = new JLabel("Bear Claw Brew ----- $2");
/*** Add Components ***/
panel.add(title, BorderLayout.NORTH);
panel.add(buffer, BorderLayout.WEST);
panel.add(bearBrew, BorderLayout.CENTER);
return panel;
}
}
答案 0 :(得分:3)
您正在使用BoxLayout设置中心的布局,因此需要将其传递到BoxLayout构造函数中。所以不是这样:
center.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
而是这个:
center.setLayout(new BoxLayout(center, BoxLayout.Y_AXIS));
答案 1 :(得分:0)
只是添加...我注意到BoxLayout需要一个已经初始化的目标。 此,在构造函数中调用时未完全初始化,因此下面给出的与上面给出的示例/答案相关的代码将产生相同的错误。
JPanel center = new JPanel(new BoxLayout(center, BoxLayout.Y_AXIS));
请注意,在这种情况下使用了 center ,但是它失败了,因为它在构造函数中被调用,因此是上面的解决方案。