Java 2个JPanel,但不知道如何控制它们
嘿,我想做一个天气小程序,但我不明白每次j面板一个覆盖另一个这里是什么,我希望它看起来像在最后 在我得到这部分代码后,我将制作一个if-else语句,根据“季节”绘制图像 这在我的课堂上是一个很大的分数,请不要告诉我为什么老师不应该教CS或其他任何东西。这对我没有帮助。我在编程时使用Ready java,所以如果你能尝试保留相同的数据包,我非常缺乏经验,也很迷茫,但我需要在周一之前完成这项工作,并且已经为此工作了很长时间 好的,我正在尝试一个带有边框布局的新文件,我将创建下面的类,并尝试调用它们,我猜Java 2个JPanel,但不知道如何控制它们,java,swing,applet,jpanel,layout-manager,Java,Swing,Applet,Jpanel,Layout Manager,嘿,我想做一个天气小程序,但我不明白每次j面板一个覆盖另一个这里是什么,我希望它看起来像在最后 在我得到这部分代码后,我将制作一个if-else语句,根据“季节”绘制图像 这在我的课堂上是一个很大的分数,请不要告诉我为什么老师不应该教CS或其他任何东西。这对我没有帮助。我在编程时使用Ready java,所以如果你能尝试保留相同的数据包,我非常缺乏经验,也很迷茫,但我需要在周一之前完成这项工作,并且已经为此工作了很长时间 好的,我正在尝试一个带有边框布局的新文件,我将创建下面的类,并尝试调用它
public class Final
{
JPanel jPanel1, jPanel2;
JButton Enter, Exit;
JTextField location;
JLabel city;
JRadioButton time;
JComboBox Seasons;
Random rand = new Random ();
int P = rand.nextInt (100) + 1; //Random Precipitation
int H = rand.nextInt (50) + 1; //Random Heat
public void init ()
{
JPanel contentPane = getContentPane ();
contentPane.setLayout (new BorderLayout ());
contentPane.add (locationGui, BorderLayout.NORTH);
contentPane.add (temp, BorderLayout.EAST);
contentPane.add (Percip (g), BorderLayout.SOUTH);
contentPane.add (image, BorderLayout.CENTER);
}
public void drawPercip (Graphics g)
{
//Precipitation Bar
g.setColor (Color.black);
g.drawRect (40, 170, 100, 20); //outline of bar
g.setColor (Color.blue);
g.fillRect (40 + 1, 170 + 4, P, 14); //indicator bar (+4 puts space beetween outline bar)
}
}
这是我现在使用的代码,我在其中获得了位置gui部件,但当我尝试使用tlabel=new DrawingPanel()时;它说这是不可能的,所以我怎么才能把那张图片带进来呢?我非常确定我需要使用actionlistener,所以我必须在稍后将其添加到实现中
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.util.*;
public class Final2 extends JFrame
{
//Panels
JPanel locationGui = new JPanel ();
JPanel temp = new JPanel ();
JPanel percip = new JPanel ();
JPanel image = new JPanel ();
//Location gui components
JButton Enter, Exit;
JTextField location;
JLabel city;
JRadioButton time;
JComboBox Seasons;
//bar # genertor
Random rand = new Random ();
int P = rand.nextInt (100) + 1; //Random Precipitation
int H = rand.nextInt (50) + 1; //Random Heat
public Final2 ()
{
init ();
}
public void init ()
{
Font font = new Font ("impact", Font.PLAIN, 20);
//________________________________________________new panel____________________
locationGui.setBackground (Color.RED);
JLabel guiLabel = new JLabel ("");
guiLabel.setFont (font);
Enter = new JButton ("Enter");
Exit = new JButton ("exit");
city = new JLabel ("What city?");
location = new JTextField (20); //location entry field
Seasons = new JComboBox ();
Seasons.addItem ("Summer");
Seasons.addItem ("Fall");
Seasons.addItem ("Winter");
Seasons.addItem ("Spring");
time = new JRadioButton ("check if night?");
locationGui.add (city);
locationGui.add (location);
locationGui.add (Seasons);
locationGui.add (time);
locationGui.add (guiLabel);
//________________________________________________new panel____________________
temp.setBackground (Color.BLUE);
temp.setLayout (new GridBagLayout ());
JLabel tempLabel = new JLabel ("Temp");
tempLabel.setFont (font);
temp.add (tempLabel);
//________________________________________________new panel____________________
percip.setBackground (Color.GREEN);
JLabel pLabel = new JLabel ("Percip");
pLabel.setFont (font);
percip.add (pLabel);
//________________________________________________new panel____________________
image.setBackground (Color.ORANGE);
image.setLayout (new GridBagLayout ());
JLabel imageLabel = new JLabel ("Image");
imageLabel.setFont (font);
image.add (imageLabel);
Container contentPane = getContentPane ();
contentPane.setLayout (new BorderLayout ());
contentPane.add (locationGui, BorderLayout.NORTH);
contentPane.add (temp, BorderLayout.EAST);
contentPane.add (percip, BorderLayout.SOUTH);
contentPane.add (image, BorderLayout.CENTER);
setContentPane (contentPane);
setDefaultCloseOperation (EXIT_ON_CLOSE);
setSize (400, 400);
setLocationRelativeTo (null);
setVisible (true);
}
public static void main (String[] args)
{
SwingUtilities.invokeLater (new Runnable ()
{
public void run ()
{
new Final2 ();
}
}
);
}
private class DrawingPanel extends javax.swing.JPanel
{
public void paint (Graphics g)
{
super.paint (g);
Graphics2D g2d = (Graphics2D) g;
drawPercip (g);
}
}
public void drawPercip (Graphics g)
{
//Precipitation Bar
g.setColor (Color.black);
g.drawRect (40, 170, 100, 20); //outline of bar
g.setColor (Color.blue);
g.fillRect (40 + 1, 170 + 4, P, 14); //indicator bar (+4 puts space beetween outline bar)
}
public void drawTemp (Graphics g)
{
//Temparature Bar
g.setColor (Color.red);
g.fillRect (170 + 4, 50, 14, 100); //Covers in
g.setColor (Color.black);
g.drawRect (170, 50, 20, 100); //outline of bar
g.setColor (Color.white);
g.fillRect (170 + 4, 50 + 1, 16, 100 - H); //indicator bar (+4 puts space beetween outline bar)
}
}
您发布的图像可以使用BorderLayout实现。建议阅读:
您发布的图像可以使用BorderLayout实现。建议阅读:
JApplet
没有paintComponent
方法,因此实际上没有重写任何内容。作为良好的实践,您应该使用@Override
注释来确定您正在进行有效的覆盖<代码>JApplet确实有一个绘制
方法JPanel
中覆盖paint
。而是重写paintComponent
并调用super.paintComponent
为您的新帖子更新
容器
。您可以将其设置为=aJPanel
BorderLayout
如何适用于您的Final
类
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Final extends JFrame{
JPanel locationGui = new JPanel();
JPanel temp = new JPanel();
JPanel percip= new JPanel();
JPanel image = new JPanel();
public Final() {
init();
}
public void init() {
Font font = new Font("impact", Font.PLAIN, 20);
locationGui.setBackground(Color.RED);
JLabel guiLabel = new JLabel("Location Gui");
guiLabel.setFont(font);
locationGui.add(guiLabel);
temp.setBackground(Color.BLUE);
temp.setLayout(new GridBagLayout());
JLabel tempLabel = new JLabel("Temp");
tempLabel.setFont(font);
temp.add(tempLabel);
percip.setBackground(Color.GREEN);
JLabel gLabel = new JLabel("Percip");
gLabel.setFont(font);
percip.add(gLabel);
image.setBackground(Color.ORANGE);
image.setLayout(new GridBagLayout());
JLabel imageLabel = new JLabel("Image");
imageLabel.setFont(font);
image.add(imageLabel);
Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());
contentPane.add(locationGui, BorderLayout.NORTH);
contentPane.add(temp, BorderLayout.EAST);
contentPane.add(percip, BorderLayout.SOUTH);
contentPane.add(image, BorderLayout.CENTER);
setContentPane(contentPane);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400, 400);
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
new Final();
}
});
}
}
更新到您的新编辑
- 当您执行
时,它可以工作,但存在两个问题temp=new DrawingPanel()
- 面板没有预设尺寸,面板将仅遵循框架的
边框布局
中定义的尺寸。要解决此问题,请覆盖
DrawingPanel的
getPreferredSize
不显示,因为它与背景颜色相同fillRect
private class DrawingPanel extends javax.swing.JPanel {
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
drawPercip(g);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 400);
}
}
public void drawPercip(Graphics g) {
g.setColor(Color.black);
g.drawRect(40, 170, 100, 20);
g.setColor(Color.blue);
g.fillRect(40 + 1, 170 + 4, P, 14);
}
JApplet
没有paintComponent
方法,因此实际上没有重写任何内容。作为良好的实践,您应该使用@Override
注释来确定您正在进行有效的覆盖<代码>JApplet确实有一个绘制
方法JPanel
中覆盖paint
。而是重写paintComponent
并调用super.paintComponent
为您的新帖子更新
容器
。您可以将其设置为=aJPanel
BorderLayout
如何适用于您的Final
类
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Final extends JFrame{
JPanel locationGui = new JPanel();
JPanel temp = new JPanel();
JPanel percip= new JPanel();
JPanel image = new JPanel();
public Final() {
init();
}
public void init() {
Font font = new Font("impact", Font.PLAIN, 20);
locationGui.setBackground(Color.RED);
JLabel guiLabel = new JLabel("Location Gui");
guiLabel.setFont(font);
locationGui.add(guiLabel);
temp.setBackground(Color.BLUE);
temp.setLayout(new GridBagLayout());
JLabel tempLabel = new JLabel("Temp");
tempLabel.setFont(font);
temp.add(tempLabel);
percip.setBackground(Color.GREEN);
JLabel gLabel = new JLabel("Percip");
gLabel.setFont(font);
percip.add(gLabel);
image.setBackground(Color.ORANGE);
image.setLayout(new GridBagLayout());
JLabel imageLabel = new JLabel("Image");
imageLabel.setFont(font);
image.add(imageLabel);
Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());
contentPane.add(locationGui, BorderLayout.NORTH);
contentPane.add(temp, BorderLayout.EAST);
contentPane.add(percip, BorderLayout.SOUTH);
contentPane.add(image, BorderLayout.CENTER);
setContentPane(contentPane);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400, 400);
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
new Final();
}
});
}
}
更新到您的新编辑
- 当您执行
时,它可以工作,但存在两个问题temp=new DrawingPanel()
- 面板没有预设尺寸,面板将仅遵循框架的
边框布局
中定义的尺寸。要解决此问题,请覆盖
DrawingPanel的
getPreferredSize
不显示,因为它与背景颜色相同fillRect
private class DrawingPanel extends javax.swing.JPanel {
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
drawPercip(g);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 400);
}
}
public void drawPercip(Graphics g) {
g.setColor(Color.black);
g.drawRect(40, 170, 100, 20);
g.setColor(Color.blue);
g.fillRect(40 + 1, 170 + 4, P, 14);
}
首先调用setLayout(null),然后再调用setLayout(newflowlayout())。你想用哪一个?您几乎应该始终使用布局(而不是空布局),在这种情况下,在JPanel上调用setBounds()将不起作用。相反,请尝试调用setMinimumSize()和setPreferredSize()。推荐阅读:好吧,我希望按钮作为flow layout,我希望只保留另一个作为一个框架,我猜您首先调用setLayout(null),然后再调用setLayout(new FlowLayout())。你想用哪一个?您几乎应该始终使用布局(而不是空布局),在这种情况下,在JPanel上调用setBounds()将不起作用。相反,请尝试调用setMinimumSize()和setPreferredSize()。推荐阅读:好吧,我想要按钮作为流程布局,我希望只保留另一个作为一个框架,我猜好吧,这样我可以更容易地遵循一个新文件,并发布我在上面尝试过的内容,但我仍然是这样lost@CurtisSpence你有什么困惑吗?我强烈建议你从小处做起,一路往上爬。这是一个关于布局的教程,包括BorderLayout。我希望我能做到这一点,但这是一个最终的项目,我只是对我所学的东西画了一个空白。好吧,让我更容易遵循一个新的文件,并发布了我在上面尝试过的内容,但我仍然是这样lost@CurtisSpence你有什么困惑吗?我强烈建议你从小处做起,一路往上爬。是一个关于布局的教程,包括BorderLayout。我希望我可以这样做,但这是一个最终的项目,我只是对所学内容一窍不通。我不太了解你的观点,但我将尝试BorderLayout idk,我将如何添加其余的组件,尽管我想我会在底部创建g.draw方法并将它们调用到每个领域,但我也不明白我是怎么做到的=S@overide是