Java 需要调整窗口大小,程序才能工作
这是我的布局类的代码Java 需要调整窗口大小,程序才能工作,java,swing,resize,layout-manager,flowlayout,Java,Swing,Resize,Layout Manager,Flowlayout,这是我的布局类的代码 import java.awt.event.*; import java.awt.*; import javax.swing.*; public class Layout extends JFrame { private JButton lb; private JButton cb; private JButton pb; private FlowLayout layout; private Container container;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class Layout extends JFrame {
private JButton lb;
private JButton cb;
private JButton pb;
private FlowLayout layout;
private Container container;
public Layout() {
super("The Title");
layout = new FlowLayout();
container = new Container();
setLayout(layout);
//*Left
lb = new JButton("L");
add(lb);
lb.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
layout.setAlignment(FlowLayout.LEFT);
layout.layoutContainer(container);
}
}
);
//*Center
cb = new JButton("C");
add(cb);
cb.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
layout.setAlignment(FlowLayout.CENTER);
layout.layoutContainer(container);
}
}
);
//*Right
pb = new JButton("R");
add(pb);
pb.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
layout.setAlignment(FlowLayout.RIGHT);
layout.layoutContainer(container);
}
}
);
}
}
我正在通过NewBoston youtube教程学习java(此代码来自教程)。但这一个不能像它应该的那样工作。当我点击右键(R)时,它会立即将所有按钮拖到窗口的右侧。事实并非如此。然而,当我点击右键,然后强行调整窗口大小,然后它做它应该做的。通过在main方法中添加setresizeable(false),我无法调整程序的大小,因此它无法工作。
我做错了什么
请原谅我英语不好。最简单的方法是设置一个新的FlowLayout并调用invalidate(): 更新当前的FlowLayout无效。替换
container = new Container();
借
不是最简单的:-)最简单的是重新确认其中一个孩子的身份,f.i.L愿上帝保佑你,我的朋友。
container = new Container();
container = getContentPane();