如何使JPanel项位于同一BorderLayout中的另一个项之下? [英] How do I make a JPanel item go under another item in the same BorderLayout?

问题描述

我正在尝试将我的JTextField(desc)放在JSpinner，(dayspinner)下，但是我不确定如何.如果将文本字段放在SOUTH中，它将一直一直到窗口底部.我还想通过在开始菜单中将3个按钮彼此相邻来实现此问题的解决方案，我希望它们可以彼此叠置.

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class Scheduler {

  JButton VDay, VWeek, Task, Exit;
  JFrame wframe, dframe, tframe;
  JTextField hin, min, desc;
  JLabel time;
  JSpinner dayspinner;

  class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      if (e.getSource() == VDay) {
        dframe.setVisible(true);
      } else if (e.getSource() == VWeek) {
        wframe.setVisible(true);
      } else if (e.getSource() == Task) {
        tframe.setVisible(true);
      } else if (e.getSource() == Exit) {
        System.exit(0);
      }
    }
  }

  public String[] getDayStrings() {
    String[] dayStrings = {
      "Sunday",
      "Monday",
      "Tuesday",
      "Wednesday",
      "Thursday",
      "Friday",
      "Saturday",
    };
    return dayStrings;
  }


  public void CreateFrame() {
    JFrame frame = new JFrame("Main Menu");
    frame.setSize(350, 250);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    ButtonListener btnlst = new ButtonListener();
    VDay = new JButton("View Day");
    VWeek = new JButton("View Week");
    Task = new JButton("Assign/Edit Tasks");
    Exit = new JButton("Exit");

    VDay.addActionListener(btnlst);
    VWeek.addActionListener(btnlst);
    Task.addActionListener(btnlst);
    Exit.addActionListener(btnlst);

    JPanel center = new JPanel();
    JPanel south = new JPanel();
    south.add(Exit);
    center.add(Task);
    center.add(VDay);
    center.add(VWeek);
    frame.add(south, BorderLayout.SOUTH);
    frame.add(center, BorderLayout.CENTER);
    frame.setVisible(true);


    dframe = new JFrame("Today's Schedule");
    dframe.setSize(500, 500);
    dframe.setVisible(false);

    wframe = new JFrame("Week's Schedule");
    wframe.setSize(1050, 400);
    wframe.setVisible(false);

    tframe = new JFrame("Edit/Add Tasks");
    tframe.setSize(500, 500);
    tframe.setVisible(false);

    //GUI for tframe
    JPanel tnorth = new JPanel();
    JPanel tcenter = new JPanel();
    JPanel tsouth = new JPanel();
    tframe.add(tnorth, BorderLayout.NORTH);
    tframe.add(tcenter, BorderLayout.CENTER);
    tframe.add(tsouth, BorderLayout.SOUTH);

    //time input
    time = new JLabel("Time (HH:MM): ");
    tnorth.add(time);
    hin = new JTextField(2);
    hin.setColumns(5);
    tnorth.add(hin);
    min = new JTextField(2);
    min.setColumns(5);
    tnorth.add(min);

    //select day
    String[] dayStrings = getDayStrings();
    dayspinner = new JSpinner(new SpinnerListModel(dayStrings));
    dayspinner.setPreferredSize(new Dimension(85, 20));
    tcenter.add(dayspinner);

    //event description
    desc = new JTextField(35);
    desc.setColumns(30);
    tcenter.add(desc);


  }


  public static void main(String[] args) {
    Scheduler scheduler = new Scheduler();
    scheduler.CreateFrame();
  }
}

解决方案

不要使用BorderLayout，它并不是按照您想要的方式设计的，请考虑尝试使用类似GridBagLayout的方法，这要灵活得多.

有关更多详细信息，请参见如何使用GridBagLayout >

I am trying to get my JTextField (desc) to under the JSpinner, (dayspinner) but I'm not sure how. If I put the text field in SOUTH, it just goes all the way to the bottom of the window. I would also like to implement whatever solution there is to this problem with my beginning menu with the 3 buttons next to each other, I would much rather them be on top of one another.

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class Scheduler {

  JButton VDay, VWeek, Task, Exit;
  JFrame wframe, dframe, tframe;
  JTextField hin, min, desc;
  JLabel time;
  JSpinner dayspinner;

  class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      if (e.getSource() == VDay) {
        dframe.setVisible(true);
      } else if (e.getSource() == VWeek) {
        wframe.setVisible(true);
      } else if (e.getSource() == Task) {
        tframe.setVisible(true);
      } else if (e.getSource() == Exit) {
        System.exit(0);
      }
    }
  }

  public String[] getDayStrings() {
    String[] dayStrings = {
      "Sunday",
      "Monday",
      "Tuesday",
      "Wednesday",
      "Thursday",
      "Friday",
      "Saturday",
    };
    return dayStrings;
  }


  public void CreateFrame() {
    JFrame frame = new JFrame("Main Menu");
    frame.setSize(350, 250);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    ButtonListener btnlst = new ButtonListener();
    VDay = new JButton("View Day");
    VWeek = new JButton("View Week");
    Task = new JButton("Assign/Edit Tasks");
    Exit = new JButton("Exit");

    VDay.addActionListener(btnlst);
    VWeek.addActionListener(btnlst);
    Task.addActionListener(btnlst);
    Exit.addActionListener(btnlst);

    JPanel center = new JPanel();
    JPanel south = new JPanel();
    south.add(Exit);
    center.add(Task);
    center.add(VDay);
    center.add(VWeek);
    frame.add(south, BorderLayout.SOUTH);
    frame.add(center, BorderLayout.CENTER);
    frame.setVisible(true);


    dframe = new JFrame("Today's Schedule");
    dframe.setSize(500, 500);
    dframe.setVisible(false);

    wframe = new JFrame("Week's Schedule");
    wframe.setSize(1050, 400);
    wframe.setVisible(false);

    tframe = new JFrame("Edit/Add Tasks");
    tframe.setSize(500, 500);
    tframe.setVisible(false);

    //GUI for tframe
    JPanel tnorth = new JPanel();
    JPanel tcenter = new JPanel();
    JPanel tsouth = new JPanel();
    tframe.add(tnorth, BorderLayout.NORTH);
    tframe.add(tcenter, BorderLayout.CENTER);
    tframe.add(tsouth, BorderLayout.SOUTH);

    //time input
    time = new JLabel("Time (HH:MM): ");
    tnorth.add(time);
    hin = new JTextField(2);
    hin.setColumns(5);
    tnorth.add(hin);
    min = new JTextField(2);
    min.setColumns(5);
    tnorth.add(min);

    //select day
    String[] dayStrings = getDayStrings();
    dayspinner = new JSpinner(new SpinnerListModel(dayStrings));
    dayspinner.setPreferredSize(new Dimension(85, 20));
    tcenter.add(dayspinner);

    //event description
    desc = new JTextField(35);
    desc.setColumns(30);
    tcenter.add(desc);


  }


  public static void main(String[] args) {
    Scheduler scheduler = new Scheduler();
    scheduler.CreateFrame();
  }
}

解决方案

Don't use BorderLayout, it's not designed to do what you want, consider trying to use something like GridBagLayout instead, which is far more flexible

See How to Use GridBagLayout for more details

这篇关于如何使JPanel项位于同一BorderLayout中的另一个项之下?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！