过去一个月我一直在研究GUI,我发现JSpinner不知何故停止正确显示。只有边框出现,没有数字,没有箭头,看图片:
我可以判断某个组件何时启用,但这不是问题。
起始类,MAIN方法为:
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPopupMenu;
public class Starter extends JFrame {
public final int WIDTH = 205, HEIGHT = 280;
private static final long serialVersionUID = 1L;
public Starter() throws InterruptedException {
super("Editor");
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
setLocation(0, 0);
setSize(WIDTH + 5, HEIGHT + 50);
setVisible(true);
setResizable(false);
setLocation(80, 180);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
loadCaterogy(new EditorObjectProperties());
}
public void loadCaterogy(EditorCategoryTemplate category) {
for (Component component : category.getCategoryComponents()) {
add(component);
}
repaint();
}
public static void main(String[] args) {
try {
new Starter();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
编辑类别 - 所有组件均为:
import java.awt.Font;
import java.awt.TextArea;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
public class EditorObjectProperties extends EditorCategoryTemplate {
public JLabel xLabel;
public JSpinner xSpinner;
public JLabel yLabel;
public JSpinner ySpinner;
public JLabel angleLabel;
public JSpinner angleSpinner;
public JLabel widthLabel;
public JSpinner widthSpinner;
public JButton deleteButton;
public JLabel textLabel;
public TextArea textArea;
public void addCategoryComponents() {
xLabel = new JLabel("x:");
xLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
xLabel.setBounds(25, 15, 15, 14);
add(xLabel);
xSpinner = new JSpinner(new SpinnerNumberModel(0, 0, WIDTH, 1));
xSpinner.setBounds(42, 12, 50, 20);
xSpinner.setEnabled(false);
add(xSpinner);
yLabel = new JLabel("y:");
yLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
yLabel.setBounds(102, 12, 15, 20);
add(yLabel);
ySpinner = new JSpinner(new SpinnerNumberModel(0, 0, HEIGHT, 1));
ySpinner.setBounds(117, 12, 50, 20);
ySpinner.setEnabled(false);
add(ySpinner);
angleLabel = new JLabel("angle:");
angleLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
angleLabel.setBounds(25, 47, 50, 20);
add(angleLabel);
angleSpinner = new JSpinner(new SpinnerNumberModel(0, -5, 360, 5));
angleSpinner.setBounds(72, 49, 95, 20);
angleSpinner.setEnabled(false);
add(angleSpinner);
widthLabel = new JLabel("width:");
widthLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
widthLabel.setBounds(25, 87, 50, 20);
add(widthLabel);
widthSpinner = new JSpinner(new SpinnerNumberModel(10, 10, WIDTH, 10));
widthSpinner.setBounds(72, 86, 95, 20);
widthSpinner.setEnabled(false);
add(widthSpinner);
textLabel = new JLabel("text:");
textLabel.setFont(new Font("Tahoma", Font.PLAIN, 14));
textLabel.setBounds(25, 173, 50, 20);
add(textLabel);
textArea = new TextArea();
textArea.setBounds(72, 127, 95, 112);
textArea.setEnabled(false);
add(textArea);
deleteButton = new JButton("Delete Object");
deleteButton.setBounds(10, 250, 174, 25);
deleteButton.setEnabled(false);
add(deleteButton);
add(new JLabel());
}
}
抽象类别模板,其中一些幕后方法是:
import java.awt.Component;
import java.util.ArrayList;
public abstract class EditorCategoryTemplate {
public final int WIDTH = 205, HEIGHT = 280;
public ArrayList<Component> components;
public EditorCategoryTemplate() {
this.components = new ArrayList<Component>();
start();
}
public abstract void addCategoryComponents();
public void add(Component component) {
components.add(component);
}
public ArrayList<Component> getCategoryComponents() {
return components;
}
private void start() {
addCategoryComponents();
}
}
答案 0 :(得分:2)
您的问题与Swing线程无关,与布局无关,也没有正确使用它们,实际上您有三个主要问题:
setVisible(true)
请注意,这并不是说您的线程是正确的,事实并非如此,但修复此问题绝不会修复因此而导致的GUI和布局问题。
因此,对于“快速修复”,您可以通过以下方式解决问题1和2:
public Starter() throws InterruptedException {
super("Editor");
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
setLocation(0, 0);
setSize(WIDTH + 5, HEIGHT + 50);
// **** REMOVE ****
// setVisible(true);
setResizable(false);
setLocation(80, 180);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
// **** ADD ****
getContentPane().setLayout(null);
loadCaterogy(new EditorObjectProperties());
// **** ADD ****
setVisible(true);
}
对于更强大的修复,我会更多地使用布局管理器。例如,这可能是一个起点:
import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.*;
public class EditorEg extends JPanel {
private static final int MAX_X = 205;
private static final int MAX_Y = 280;
private static final int TA_ROWS = 8;
private static final int TA_COLS = 16;
private JSpinner xSpinner = new JSpinner(new SpinnerNumberModel(0, 0, MAX_X, 1));
private JSpinner ySpinner = new JSpinner(new SpinnerNumberModel(0, 0, MAX_Y, 1));
private JSpinner angleSpinner = new JSpinner(new SpinnerNumberModel(0, -5, 360, 5));
private JSpinner widthSpinner = new JSpinner(new SpinnerNumberModel(10, 10, MAX_X, 10));
private JTextArea textArea = new JTextArea(TA_ROWS, TA_COLS);
private JButton deleteButton = new JButton("Delete");
public EditorEg() {
JPanel xyPanel = new JPanel(new GridBagLayout());
int gap = 2;
Insets insets = new Insets(gap, gap, gap, gap);
GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0,
GridBagConstraints.BASELINE, GridBagConstraints.HORIZONTAL, insets, 0, 0);
gbc.weightx = 0.2;
xyPanel.add(new JLabel("x:"), gbc);
gbc.gridx++;
gbc.weightx = 1.0;
xyPanel.add(xSpinner, gbc);
gbc.gridx++;
gbc.weightx = 0.2;
xyPanel.add(new JLabel("y:"), gbc);
gbc.gridx++;
gbc.weightx = 1.0;
xyPanel.add(ySpinner, gbc);
JPanel angleWidthPanel = new JPanel(new GridBagLayout());
gap = 3;
insets = new Insets(gap, gap, gap, gap);
gbc = new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0,
GridBagConstraints.BASELINE, GridBagConstraints.HORIZONTAL, insets, 0, 0);
angleWidthPanel.add(new JLabel("angle:"), gbc);
gbc.gridx++;
angleWidthPanel.add(angleSpinner, gbc);
gbc.gridx--;
gbc.gridy++;
angleWidthPanel.add(new JLabel("width:"), gbc);
gbc.gridx++;
angleWidthPanel.add(widthSpinner, gbc);
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
JPanel scrollWrapper = new JPanel(new BorderLayout());
scrollWrapper.setBorder(BorderFactory.createTitledBorder("Text"));
scrollWrapper.add(scrollPane);
setLayout(new GridBagLayout());
gap = 4;
setBorder(BorderFactory.createEmptyBorder(gap, gap, gap, gap));
insets = new Insets(gap, gap, gap, gap);
gbc = new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0,
GridBagConstraints.BASELINE, GridBagConstraints.HORIZONTAL, insets, 0, 0);
add(xyPanel, gbc);
gbc.gridy++;
add(angleWidthPanel, gbc);
gbc.gridy++;
add(scrollWrapper, gbc);
gbc.gridy++;
add(deleteButton, gbc);
}
private static void createAndShowGui() {
EditorEg mainPanel = new EditorEg();
JFrame frame = new JFrame("Editor");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
}