我正在尝试用Java创建简单的应用程序,但我在JFrame(框架)中插入JPane(pasy)时遇到问题。现在我的输出是两个窗口,一个带有电阻器,第二个带有组合盒。你能解释一下我做错了什么吗?我也试过了frame.getContentPane().add(pasy);
,但它没有用。
import java.awt.* ;
import java.awt.Color;
import java.awt.event.* ;
import java.awt.Frame ;
import java.awt.Graphics;
import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import java.util.HashMap;
import java.util.Scanner;
import java.util.Map;
public class rezystorGUI extends JFrame implements ActionListener {
String kod="",kolor="",pasek1="BLACK",pasek2="WHITE",pasek3="VIOLET",pasek4="WHITE",pasek5="BLACK";
JComboBox p1, p2, p3, p4, p5;
JTextField wynik;
ResistorColorCode rcc;
WpiszWartosc wwart;
/** * Constructor for objects of class REZYSTORGUI */
rezystorGUI(){
setTitle("Odczytywanie paskow rezystora");
setSize(375,300);
setVisible(true);
addWindowListener(new WindowAdapter(){
@Override
public void windowClosing(WindowEvent e){
e.getWindow().dispose();
}
});
rcc = new ResistorColorCode();
makeGUI() ;
}
/** method */
void makeGUI() {
JFrame frame = new JFrame();
frame.setSize(375,300);
JPanel pasy = new JPanel();
pasy.setLayout(new GridLayout(3,3));
pasy.setSize(200,200);
String[]pasek = {"BLACK","BROWN","RED","ORANGE","YELLOW","GREEN","BLUE","VIOLET","GRAY","WHITE"};
String[]multi = {"BLACK","BROWN","RED","ORANGE","YELLOW","GREEN","BLUE","VIOLET"};
String[]tol = {"BROWN","RED","GREEN","BLUE","VIOLET","GRAY","GOLD","SILVER"};
pasy.add(p1 = new JComboBox<String>(pasek));
p1.addActionListener(this);
pasy.add(p2 = new JComboBox<String>(pasek));
p2.addActionListener(this);
pasy.add(p3 = new JComboBox<String>(pasek));
p3.addActionListener(this);
pasy.add(p4 = new JComboBox<String>(multi));
p4.addActionListener(this);
pasy.add(p5 = new JComboBox<String>(tol));
p5.addActionListener(this);
wynik= new JTextField(30);
pasy.add(wynik);
frame.add(pasy);
frame.pack();
frame.setVisible(true);
}
@Override
public void paint(Graphics g) {
super.paint(g);
Map<String, Color> colors = new HashMap<String, Color>();
colors.put("BLUE", Color.BLUE);
colors.put("RED", Color.RED);
colors.put("GREEN", Color.GREEN);
colors.put("WHITE", Color.WHITE);
colors.put("YELLOW", Color.YELLOW);
colors.put("BLACK", Color.BLACK);
colors.put("ORANGE", Color.ORANGE);
colors.put("GRAY", Color.GRAY);
colors.put("VIOLET", new Color(127,0,255));
colors.put("BROWN", new Color(150,75,0));
colors.put("GOLD", new Color(255,215,0));
colors.put("SILVER", new Color(192,192,192));
colors.put("LIGHT-BLUE", new Color(153,204,255));
int x=100;
g.setColor(colors.get("GRAY"));
g.fillRect(40, 95, 60, 10);
g.setColor(colors.get("GRAY"));
g.fillRect(40, 95, 10, 50);
g.setColor(colors.get("LIGHT-BLUE"));
g.fillRect(x, 40, 20, 120);
g.setColor(colors.get(pasek1));
x=x+20;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x=x+10;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x=x+10;
g.fillRect(x, 50, 95, 100);
g.setColor(colors.get(pasek2));
x=x+5;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get(pasek3));
x=x+30;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get(pasek4));
x=x+30;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get("LIGHT-BLUE"));
x=x+30;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get(pasek5));
x=x+10;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x=x+10;
g.fillRect(x, 40, 20, 120);
g.setColor(colors.get("GRAY"));
x=x+20;
g.fillRect(x, 95, 60, 10);
x=x+50;
g.setColor(colors.get("GRAY"));
g.fillRect(x, 95, 10, 50);
}
public void actionPerformed(ActionEvent e){
Object eventSource = e.getSource();
if (eventSource == p1){
pasek1 = (String)p1.getSelectedItem();
kod+=pasek1;
repaint();
}
if (eventSource == p2){
pasek2 = (String)p2.getSelectedItem();
kod+="-";
kod+=pasek2;
repaint();
}
if (eventSource == p3){
pasek3 = (String)p3.getSelectedItem();
kod+="-";
kod+=pasek3;
repaint();
}
if (eventSource == p4){
pasek4 = (String)p4.getSelectedItem();
kod+="-";
kod+=pasek4;
repaint();
}
if (eventSource == p5){
pasek5 = (String)p5.getSelectedItem();
String tempkod;
tempkod=kod;
kod+="-";
kod+=pasek5;
repaint();
rcc.inputColorCode(kod);
kod=tempkod;
wynik.setText(rcc.convertToValues()+" Ohm(s)\n"+rcc.tolerancja+" tolerancji");
}
}
public static void main(String[] args)
{
new rezystorGUI() ;
}
}
答案 0 :(得分:1)
您的输出是两个JFrame,因为您正在创建两个JFrame。一个是扩展JFrame的类:
public class rezystorGUI extends JFrame
另一个是帧变量:
void makeGUI() {
JFrame frame = new JFrame();
解决方案:不要这样做,这很简单。我自己,我避免扩展JFrame,因为一个它有助于防止我做坏事,比如直接在JFrame中绘画(就像你正在做的那样!)。
相反,你的类扩展JPanel,在其paintComponent
方法中绘制,就像Swing绘画教程建议你做的那样,将所有组件添加到它,然后当你需要在独立显示时GUI,创建一个JFrame,将您的类添加到其contentPane,打包并显示JFrame。
如,
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.*;
public class Resistor extends JPanel {
private String kod = "";
private String kolor = "";
private String pasek1 = "BLACK";
private String pasek2 = "WHITE";
private String pasek3 = "VIOLET";
private String pasek4 = "WHITE";
private String pasek5 = "BLACK";
private String[] paseks = {pasek1, pasek2, pasek3, pasek4, pasek5};
private JLabel imageLabel = new JLabel();
private List<JComboBox<String>> combos = new ArrayList<>();
private JTextField textField = new JTextField(10);
public Resistor() {
imageLabel.setIcon(createIcon());
String[] pasek = { "BLACK", "BROWN", "RED", "ORANGE", "YELLOW", "GREEN", "BLUE", "VIOLET",
"GRAY", "WHITE" };
String[] multi = { "BLACK", "BROWN", "RED", "ORANGE", "YELLOW", "GREEN", "BLUE", "VIOLET" };
String[] tol = { "BROWN", "RED", "GREEN", "BLUE", "VIOLET", "GRAY", "GOLD", "SILVER" };
String[][] comboModels = {pasek, pasek, pasek, multi, tol};
JPanel comboPanel = new JPanel(new GridLayout(2, 3));
for (int i = 0; i < comboModels.length; i++) {
JComboBox<String> combo = new JComboBox<>(comboModels[i]);
combo.addActionListener(new ComboListener());
comboPanel.add(combo);
combos.add(combo);
}
comboPanel.add(textField);
setLayout(new BorderLayout());
add(imageLabel, BorderLayout.CENTER);
add(comboPanel, BorderLayout.PAGE_END);
}
private Icon createIcon() {
String[] pasek = { "BLACK", "BROWN", "RED", "ORANGE", "YELLOW", "GREEN", "BLUE", "VIOLET",
"GRAY", "WHITE" };
String[] multi = { "BLACK", "BROWN", "RED", "ORANGE", "YELLOW", "GREEN", "BLUE", "VIOLET" };
String[] tol = { "BROWN", "RED", "GREEN", "BLUE", "VIOLET", "GRAY", "GOLD", "SILVER" };
Map<String, Color> colors = new HashMap<String, Color>();
colors.put("BLUE", Color.BLUE);
colors.put("RED", Color.RED);
colors.put("GREEN", Color.GREEN);
colors.put("WHITE", Color.WHITE);
colors.put("YELLOW", Color.YELLOW);
colors.put("BLACK", Color.BLACK);
colors.put("ORANGE", Color.ORANGE);
colors.put("GRAY", Color.GRAY);
colors.put("VIOLET", new Color(127, 0, 255));
colors.put("BROWN", new Color(150, 75, 0));
colors.put("GOLD", new Color(255, 215, 0));
colors.put("SILVER", new Color(192, 192, 192));
colors.put("LIGHT-BLUE", new Color(153, 204, 255));
int w = 375;
int h = 200;
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = img.createGraphics();
int x = 100;
g.setColor(colors.get("GRAY"));
g.fillRect(40, 95, 60, 10);
g.setColor(colors.get("GRAY"));
g.fillRect(40, 95, 10, 50);
g.setColor(colors.get("LIGHT-BLUE"));
g.fillRect(x, 40, 20, 120);
g.setColor(colors.get(pasek1));
x = x + 20;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x = x + 10;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x = x + 10;
g.fillRect(x, 50, 95, 100);
g.setColor(colors.get(pasek2));
x = x + 5;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get(pasek3));
x = x + 30;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get(pasek4));
x = x + 30;
g.fillRect(x, 50, 10, 100);
g.setColor(colors.get("LIGHT-BLUE"));
x = x + 30;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get(pasek5));
x = x + 10;
g.fillRect(x, 40, 10, 120);
g.setColor(colors.get("LIGHT-BLUE"));
x = x + 10;
g.fillRect(x, 40, 20, 120);
g.setColor(colors.get("GRAY"));
x = x + 20;
g.fillRect(x, 95, 60, 10);
x = x + 50;
g.setColor(colors.get("GRAY"));
g.fillRect(x, 95, 10, 50);
g.dispose();
return new ImageIcon(img);
}
private class ComboListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
// TODO finish!
}
}
private static void createAndShowGui() {
Resistor mainPanel = new Resistor();
JFrame frame = new JFrame("Resistor");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
我还建议您花一些时间在非GUI“模型”方面,例如,创建一个ColorCode类,或者更好,一个枚举,一个包含Color字段,一个String文本字段,一个int乘数字段(包含10的倍数),也许是一个双容差字段。这样做可以简化大部分代码并使调试更容易。