null-layout-manager

What's wrong with the Null Layout in Java? [duplicate]

由 浪子不回头ぞ 提交于 2019-11-27 09:51:05
This question already has an answer here: Why is it frowned upon to use a null layout in Swing? 4 answers Bonjour. Upon spending countless hours around this site looking for code to drag a component around the screen, I noticed an odd trend growing in the answers. ...being that everyone shudders at the sound of the null layout. So I ask, what's the problem everyone has with it? I've been coding for no more than three months, using Swing for no more than one, and the layout has been a breeze to use with endless customisation possible. Why is it bad practice? The major problem is the

JLabel won't show with JPanel.setLayout(null). Why?

由 房东的猫 提交于 2019-11-27 08:33:52
问题 I want to show many different labels over a map, so I'm using null layout in my panel, and calling setLocation for each label. For some reason, though, the labels don't show. If I remove the pan.setLayout(null), then the label appears in the top-center of the panel. Why isn't null layout working with setPosition? package mapa; import java.awt.*; import javax.swing.*; public class Mapa extends JFrame { private static JPanel pan; private static JLabel lab; public Mapa() { } private static void

setLocation of Label

由 夙愿已清 提交于 2019-11-27 07:27:01
问题 I have all of the labels working correctly but the userLabel[3] is not positioning properly No matter what I do, the label "Color:" always shows up on the frame with a x-coordinate of 0 and a y-coordinate that is half way down the frame. JLabel[] userLabel = new JLabel[4]; for(int p = 0; p < userLabel.length; p++){ userLabel[p] = new JLabel(); userLabel[p].setSize(100,50); frameSetUp.add(userLabel[p]); } userLabel[0].setText("Width of Frame:"); userLabel[1].setText("Height of Frame:");

JButton() only working when mouse hovers

由 家住魔仙堡 提交于 2019-11-26 19:07:29
import java.awt.*; import java.awt.image.*; import java.awt.event.*; import javax.imageio.*; import java.lang.*; import java.io.*; import javax.swing.*; public class MainClass extends Component{ private Image bg; private ImageIcon newgame; private ImageIcon quit; private ImageIcon options; private JButton bquit; private JButton boptions; private JButton bnewgame; private static Container pane; //Container public void loadImage() { try { bg=ImageIO.read(new File("bg1.png")); } catch (Exception e) { } if(bg!=null) repaint(); } public void paint(Graphics g) { g.drawImage(bg,0,0,null); } public

What&#39;s wrong with the Null Layout in Java? [duplicate]

由 可紊 提交于 2019-11-26 14:55:06
问题 This question already has answers here : Why is it frowned upon to use a null layout in Swing? (4 answers) Closed 5 years ago . Bonjour. Upon spending countless hours around this site looking for code to drag a component around the screen, I noticed an odd trend growing in the answers. ...being that everyone shudders at the sound of the null layout. So I ask, what's the problem everyone has with it? I've been coding for no more than three months, using Swing for no more than one, and the

JButton() only working when mouse hovers

由 空扰寡人 提交于 2019-11-26 08:57:09
问题 import java.awt.*; import java.awt.image.*; import java.awt.event.*; import javax.imageio.*; import java.lang.*; import java.io.*; import javax.swing.*; public class MainClass extends Component{ private Image bg; private ImageIcon newgame; private ImageIcon quit; private ImageIcon options; private JButton bquit; private JButton boptions; private JButton bnewgame; private static Container pane; //Container public void loadImage() { try { bg=ImageIO.read(new File(\"bg1.png\")); } catch

How to add JTable in JPanel with null layout?

由 拟墨画扇 提交于 2019-11-26 01:17:07
问题 I want to add JTable into JPanel whose layout is null . JPanel contains other components. I have to add JTable at proper position. 回答1: Nested/Combination Layout Example The Java Tutorial has comprehensive information on using layout managers. See the Laying Out Components Within a Container lesson for further details. One aspect of layouts that is not covered well by the tutorial is that of nested layouts, putting one layout inside another to get complex effects. The following code puts a

Why is it frowned upon to use a null layout in Swing?

由 老子叫甜甜 提交于 2019-11-25 22:15:22
问题 Recently, I started creating a program for the company I work for. Just as background info, I\'m still a student and a beginner programmer, so my solution is probably not recommended and I didn\'t know how to do it otherwise, but it works and I\'m not going to be judged for it because it\'s a student job totally unrelated to programming. The thing about the program is, it\'s going to be run on multiple different computer with different screen sizes and resolutions (800x600 and up). To make
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