尝试布局jpanel.每次运行时，Java程序布局都会发生变化

Question

第一次发帖，别对我太苛求。

我是Java的新手，我试图让3个jpanel彼此排列在一起。第一张图片是我想让它看起来的样子当我运行程序的时候，它有时是这样的，但是你可以从其他图片中看到，它不是每次运行时都对齐的。有时甚至不显示一些图像/组件。

我怎样才能让三个jpanel一个接一个地垂直排列?

import java.awt.event.ActionListener;
import java.awt.*;
import javax.swing.*;
public class FrameMain {
    static final int MY_MINIMUM = 0;
    static final int MY_MAXIMUM = 100;
        public static void main(String[] args) {

          JFrame frame1 = new JFrame("Harvest Frame Test");
          frame1.setVisible(true);
          frame1.setSize(800,700);
          frame1.setResizable(false);
          frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          //Container Panel
          JPanel container = new JPanel();
          container.setSize(800,700);
          container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
          frame1.add(container);

          //First Panel
          JPanel panel1 = new JPanel();
          panel1.setAlignmentX( Component.LEFT_ALIGNMENT );//0.0

          container.add(panel1);
          JButton button1 = new JButton("Add Water");
          panel1.add(button1);
          JButton button2 = new JButton("Add Food");
          panel1.add(button2);
          JButton button3 = new JButton("Add Medicine");
          panel1.add(button3);
          ImageIcon image = new ImageIcon("C:/Users/Nick/Documents/EclipseArt/plant.gif");
          JLabel imagelabel = new JLabel(image);
          panel1.add(imagelabel);
          JProgressBar pbar = new JProgressBar();
          pbar.setMinimum(MY_MINIMUM);
          pbar.setMaximum(MY_MAXIMUM);
          // add to JPanel
          panel1.add(pbar);
          // Second Panel
          JPanel panel2 = new JPanel();
          panel2.setAlignmentX( Component.LEFT_ALIGNMENT );//0.0

          container.add(panel2);
          JButton button4 = new JButton("Add Water");
          panel2.add(button4);
          JButton button5 = new JButton("Add Food");
          panel2.add(button5);
          JButton button6 = new JButton("Add Medicine");
          panel2.add(button6);
          ImageIcon image1 = new ImageIcon("C:/Users/Nick/Documents/EclipseArt/plant.gif");
          JLabel imagelabel1 = new JLabel(image1);
          panel2.add(imagelabel1);
          JProgressBar pbar1 = new JProgressBar();
          pbar1.setMinimum(MY_MINIMUM);
          pbar1.setMaximum(MY_MAXIMUM);
          // add to JPanel
          panel2.add(pbar1);
          // Third Panel
          JPanel panel3 = new JPanel();
          panel3.setAlignmentX( Component.LEFT_ALIGNMENT );//0.0
          container.add(panel3);
          JButton button7 = new JButton("Add Water");
          panel3.add(button7);
          JButton button8 = new JButton("Add Food");
          panel3.add(button8);
          JButton button9 = new JButton("Add Medicine");
          panel3.add(button9);
          ImageIcon image2 = new ImageIcon("C:/Users/Nick/Documents/EclipseArt/plant.gif");
          JLabel imagelabel2 = new JLabel(image2);
          panel3.add(imagelabel2);
          JProgressBar pbar2 = new JProgressBar();
          pbar2.setMinimum(MY_MINIMUM);
          pbar2.setMaximum(MY_MAXIMUM);
          // add to JPanel
          panel3.add(pbar2);
    }
    //static class Action implements ActionListener {
        //public void actionPerformed (ActionEvent e){

        //}
        //}
    }

Answer 1

将frame1.setVisible(true);一直移动到底部。