我花了很多时间用 Action 监听器创建一个新的 JFram，但我无法更改框架的背景颜色。我尝试过面板、getContentPane() 等。目前购买窗口显示了我想要的所有内容，但背景是白色的，我一直在尝试将其更改为灰色。
下面是我的代码。
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JLabel;
//import com.jgoodies.forms.factories.DefaultComponentFactory;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import java.awt.FlowLayout;
import javax.swing.JTextArea;
import javax.swing.JSplitPane;
import javax.swing.JTextField;
import javax.swing.JProgressBar;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JScrollBar;
import java.awt.Color;
import javax.swing.JTable;
import javax.swing.border.BevelBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.table.DefaultTableModel;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.awt.event.ActionEvent;
public class GUIroughdraft {
private JFrame frmBgszStockSimulator;
/**
* @wbp.nonvisual location=53,14
*/
//private final JLabel lblBgszStockSimulator = DefaultComponentFactory.getInstance().createTitle("BGSZ Stock Simulator");
private JTextField searchBar;
private JTable table;
private JTextField displayBox;
private JButton searchButton;
/**
* Launch the application. Testing Comment
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
GUIroughdraft window = new GUIroughdraft();
try {
window = new GUIroughdraft();
window.frmBgszStockSimulator.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public GUIroughdraft() {
try {
initialize();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Initialize the contents of the frame.
* @throws IOException
*/
private void initialize() throws IOException
{
frmBgszStockSimulator = new JFrame();
frmBgszStockSimulator.getContentPane().setBackground(Color.GRAY);
frmBgszStockSimulator.setTitle("BGSZ Stock Simulator");
frmBgszStockSimulator.setBounds(100, 100, 802, 510);
frmBgszStockSimulator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
frmBgszStockSimulator.setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmSave = new JMenuItem("Save");
mnFile.add(mntmSave);
mntmSave.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFileChooser saveFile = new JFileChooser();
saveFile.setSelectedFile(new File(".csv"));
saveFile.showSaveDialog(null);
}
});
JMenuItem mntmLoad = new JMenuItem("Load");
mnFile.add(mntmLoad);
mntmLoad.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFileChooser openFile = new JFileChooser();
openFile.showOpenDialog(null);
}
});
JMenuItem mntmOptions = new JMenuItem("Options");
mnFile.add(mntmOptions);
JMenu mnActions = new JMenu("Actions");
menuBar.add(mnActions);
JMenuItem mntmBuy = new JMenuItem("Buy");
mnActions.add(mntmBuy);
mntmBuy.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFrame frmBgszStockSimulatorBuy = new JFrame();
frmBgszStockSimulatorBuy.getContentPane().setBackground(Color.GRAY);
frmBgszStockSimulatorBuy.setTitle("Buy Stocks");
frmBgszStockSimulatorBuy.setVisible(true);
frmBgszStockSimulatorBuy.setBounds(100, 100, 500, 500);
JPanel p = new JPanel();
frmBgszStockSimulatorBuy.getContentPane().add(p);
p.setBackground(Color.gray);//To set panel background instead of frames background
frmBgszStockSimulatorBuy.add(p);
searchBar = new JTextField();
searchBar.setText("Enter your text here");
searchBar.setBounds(12, 300, 300, 22);
frmBgszStockSimulatorBuy.getContentPane().add(searchBar);
searchBar.setColumns(10);
JTextArea displayBox = new JTextArea();
displayBox.setEditable(false);
displayBox.setLineWrap(true);
displayBox.setWrapStyleWord(true);
displayBox.setText("This will be a text field that displays all your actions and information about stocks, purchases, sales, errors, etc.");
displayBox.setBounds(12, 47, 312, 317);
frmBgszStockSimulatorBuy.getContentPane().add(displayBox);
}
});
JMenuItem mntmSell = new JMenuItem("Sell");
mnActions.add(mntmSell);
JMenu mnHelp = new JMenu("Help");
menuBar.add(mnHelp);
JMenuItem mntmInfo = new JMenuItem("Info");
mnHelp.add(mntmInfo);
JMenuItem mntmAbout = new JMenuItem("How to Use");
mnHelp.add(mntmAbout);
frmBgszStockSimulator.getContentPane().setLayout(null);
JScrollBar scrollBar = new JScrollBar();
scrollBar.setBackground(Color.LIGHT_GRAY);
scrollBar.setBounds(323, 47, 21, 317);
frmBgszStockSimulator.getContentPane().add(scrollBar);
JTextArea displayBox = new JTextArea();
displayBox.setEditable(false);
displayBox.setLineWrap(true);
displayBox.setWrapStyleWord(true);
displayBox.setText("This will be a text field that displays all your actions and information about stocks, purchases, sales, errors, etc.");
displayBox.setBounds(12, 47, 312, 317);
frmBgszStockSimulator.getContentPane().add(displayBox);
searchBar = new JTextField();
searchBar.setText("Enter your text here");
searchBar.setBounds(12, 377, 637, 22);
frmBgszStockSimulator.getContentPane().add(searchBar);
searchBar.setColumns(10);
JButton searchButton = new JButton();
searchButton.setText("Search");
searchButton.setBounds(654, 377, 93, 22);
frmBgszStockSimulator.getContentPane().add(searchButton);
searchButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String userInput = searchBar.getText();
GetStockData gd = new GetStockData();
try
{
gd.pullPriceData(userInput);
}
catch (IOException er)
{
er.printStackTrace();
}
String output = Double.toString(gd.getPrice());;
if(output == "0")
{
displayBox.setText("NO STOCK FOUND");
}
displayBox.setText("The Price for " + userInput + ": $" + output);
//get to print in the table.
//userInput = stock ticker
//ouput = price
}
});
JProgressBar progressBar = new JProgressBar();
progressBar.setStringPainted(true);
progressBar.setValue(75);
progressBar.setBounds(50, 412, 586, 14);
frmBgszStockSimulator.getContentPane().add(progressBar);
table = new JTable();
table.setModel(new DefaultTableModel(
new Object[][] {
{"Stock Name", "Stock Value", "Amount Owned", "Total Value"},
{" BAC", "$13.48", "4", "$53.92"},
{" RIG", "$8.89", "0", "$0.00"},
{" SUNE", "$0.59", "12", "$7.08"},
{" FCX", "$10.29", "2", "$20.58"},
{" PBR", "$5.86", "0", "$0.00"},
{" GE", "$31.83", "0", "$0.00"},
{" VALE", "$4.24", "24", "$101.76"},
{" VRX", "$27.07", "0", "$0.00"},
{" PFE", "$30.07", "0", "$0.00"},
{" CRC", "$1.05", "8", "$8.40"},
{" GGB", "$1.82", "0", "$0.00"},
{" CHK", "$4.01", "6", "$24.06"},
{" T", "$39.37", "0", "$0.00"},
{" F", "$13.35", "5", "$66.75"},
{" WLL", "$7.66", "0", "$0.00"},
},
new String[] {
"New column", "New column", "New column", "New column"
}
));
table.setBorder(new BevelBorder(BevelBorder.LOWERED, null, null, null, null));
table.setBounds(350, 51, 395, 313);
frmBgszStockSimulator.getContentPane().add(table);
JTextArea txtrValue = new JTextArea();
txtrValue.setText("Displays Cash Value");
txtrValue.setLineWrap(true);
txtrValue.setEditable(false);
txtrValue.setBounds(99, 12, 172, 22);
frmBgszStockSimulator.getContentPane().add(txtrValue);
JTextArea txtrCurrentPortfolioValue = new JTextArea();
txtrCurrentPortfolioValue.setText("Display Portfolio Value");
txtrCurrentPortfolioValue.setLineWrap(true);
txtrCurrentPortfolioValue.setEditable(false);
txtrCurrentPortfolioValue.setBounds(376, 12, 206, 22);
frmBgszStockSimulator.getContentPane().add(txtrCurrentPortfolioValue);
JLabel lblCashValue = new JLabel("Cash Value:");
lblCashValue.setBounds(24, 15, 111, 16);
frmBgszStockSimulator.getContentPane().add(lblCashValue);
JLabel lblPortfolioValue = new JLabel("Portfolio Value:");
lblPortfolioValue.setBounds(283, 15, 123, 16);
frmBgszStockSimulator.getContentPane().add(lblPortfolioValue);
}
/* private class customListener implements ActionListener {
private GUIroughdraft window;
public customListener(GUIroughdraft window) {
this.window = window;
}
public void actionPerformed(ActionEvent e) {
String userInput = window.searchBar.getText();
GetStockData gd = new GetStockData();
try {
gd.pullPriceData(userInput);
} catch (IOException er) {
er.printStackTrace();
}
String output = Double.toString(gd.getPrice());
window.displayBox.setText("The Price for " + userInput + ":" + output);
}
}*/
最佳答案
问题出在您正在使用的 LayoutManager 上。 Frame 的默认布局管理器是 BorderLayout 。当您在语句frmBgszStockSimulatorBuy.getContentPane().add(displayBox)中将displayBox添加到frmBgszStockSimulatorBuy时。它被添加到框架的中心，并带有约束 BorderLayout.CENTER。因此，一旦调整了框架的大小，它就会调整为框架的完整大小。当我将第二个参数指定的语句更改为 PAGE_CHART 时，显示框将添加到 PAGE_START:
frmBgszStockSimulatorBuy.getContentPane().add(displayBox, BorderLayout.PAGE_START);
您可以看到进行此更改后设置的颜色“灰色”。更改上面的代码以查看应用于框架的背景颜色。您可以阅读有关 BorderLayout 的更多信息 here 。 这是我用来测试的完整代码。我评论了你的一些我无法编译的代码。
package org.example;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JProgressBar;
import javax.swing.JScrollBar;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.BevelBorder;
import javax.swing.table.DefaultTableModel;
public class GUIroughdraft {
private JFrame frmBgszStockSimulator;
/**
* @wbp.nonvisual location=53,14
*/
//private final JLabel lblBgszStockSimulator = DefaultComponentFactory.getInstance().createTitle("BGSZ Stock Simulator");
private JTextField searchBar;
private JTable table;
private JTextField displayBox;
private JButton searchButton;
/**
* Launch the application. Testing Comment
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
GUIroughdraft window = new GUIroughdraft();
try {
window = new GUIroughdraft();
window.frmBgszStockSimulator.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public GUIroughdraft() {
try {
initialize();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Initialize the contents of the frame.
* @throws IOException
*/
private void initialize() throws IOException
{
frmBgszStockSimulator = new JFrame();
frmBgszStockSimulator.getContentPane().setBackground(Color.WHITE);
frmBgszStockSimulator.setTitle("BGSZ Stock Simulator");
frmBgszStockSimulator.setBounds(100, 100, 802, 510);
frmBgszStockSimulator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
frmBgszStockSimulator.setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmSave = new JMenuItem("Save");
mnFile.add(mntmSave);
mntmSave.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFileChooser saveFile = new JFileChooser();
saveFile.setSelectedFile(new File(".csv"));
saveFile.showSaveDialog(null);
}
});
JMenuItem mntmLoad = new JMenuItem("Load");
mnFile.add(mntmLoad);
mntmLoad.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFileChooser openFile = new JFileChooser();
openFile.showOpenDialog(null);
}
});
JMenuItem mntmOptions = new JMenuItem("Options");
mnFile.add(mntmOptions);
JMenu mnActions = new JMenu("Actions");
menuBar.add(mnActions);
JMenuItem mntmBuy = new JMenuItem("Buy");
mnActions.add(mntmBuy);
mntmBuy.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
JFrame frmBgszStockSimulatorBuy = new JFrame();
frmBgszStockSimulatorBuy.getContentPane().setBackground(Color.RED);
frmBgszStockSimulatorBuy.setTitle("Buy Stocks");
frmBgszStockSimulatorBuy.setVisible(true);
frmBgszStockSimulatorBuy.setBounds(100, 100, 500, 500);
// JPanel p = new JPanel();
// frmBgszStockSimulatorBuy.getContentPane().add(p);
// p.setBackground(Color.gray);//To set panel background instead of frames background
// frmBgszStockSimulatorBuy.add(p);
//
// searchBar = new JTextField();
// searchBar.setText("Enter your text here");
// searchBar.setBounds(12, 300, 300, 22);
// frmBgszStockSimulatorBuy.getContentPane().add(searchBar);
// searchBar.setColumns(10);
//
JTextArea displayBox = new JTextArea();
displayBox.setEditable(false);
displayBox.setLineWrap(true);
displayBox.setWrapStyleWord(true);
displayBox.setText("This will be a text field that displays all your actions and information about stocks, purchases, sales, errors, etc.");
//
displayBox.setBounds(12, 47, 312, 317);
frmBgszStockSimulatorBuy.getContentPane().add(displayBox, BorderLayout.PAGE_START); //This is where BorderLayout.PAGE_START is added.
}
});
JMenuItem mntmSell = new JMenuItem("Sell");
mnActions.add(mntmSell);
JMenu mnHelp = new JMenu("Help");
menuBar.add(mnHelp);
JMenuItem mntmInfo = new JMenuItem("Info");
mnHelp.add(mntmInfo);
JMenuItem mntmAbout = new JMenuItem("How to Use");
mnHelp.add(mntmAbout);
frmBgszStockSimulator.getContentPane().setLayout(null);
JScrollBar scrollBar = new JScrollBar();
scrollBar.setBackground(Color.LIGHT_GRAY);
scrollBar.setBounds(323, 47, 21, 317);
frmBgszStockSimulator.getContentPane().add(scrollBar);
JTextArea displayBox = new JTextArea();
displayBox.setEditable(false);
displayBox.setLineWrap(true);
displayBox.setWrapStyleWord(true);
displayBox.setText("This will be a text field that displays all your actions and information about stocks, purchases, sales, errors, etc.");
displayBox.setBounds(12, 47, 312, 317);
frmBgszStockSimulator.getContentPane().add(displayBox);
searchBar = new JTextField();
searchBar.setText("Enter your text here");
searchBar.setBounds(12, 377, 637, 22);
frmBgszStockSimulator.getContentPane().add(searchBar);
searchBar.setColumns(10);
JButton searchButton = new JButton();
searchButton.setText("Search");
searchButton.setBounds(654, 377, 93, 22);
frmBgszStockSimulator.getContentPane().add(searchButton);
searchButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String userInput = searchBar.getText();
// GetStockData gd = new GetStockData();
// try
// {
// gd.pullPriceData(userInput);
//
// }
// catch (IOException er)
// {
// er.printStackTrace();
//
// }
//
// String output = Double.toString(gd.getPrice());;
// if(output == "0")
// {
// displayBox.setText("NO STOCK FOUND");
// }
// displayBox.setText("The Price for " + userInput + ": $" + output);
//get to print in the table.
//userInput = stock ticker
//ouput = price
}
});
JProgressBar progressBar = new JProgressBar();
progressBar.setStringPainted(true);
progressBar.setValue(75);
progressBar.setBounds(50, 412, 586, 14);
frmBgszStockSimulator.getContentPane().add(progressBar);
table = new JTable();
table.setModel(new DefaultTableModel(
new Object[][] {
{"Stock Name", "Stock Value", "Amount Owned", "Total Value"},
{" BAC", "$13.48", "4", "$53.92"},
{" RIG", "$8.89", "0", "$0.00"},
{" SUNE", "$0.59", "12", "$7.08"},
{" FCX", "$10.29", "2", "$20.58"},
{" PBR", "$5.86", "0", "$0.00"},
{" GE", "$31.83", "0", "$0.00"},
{" VALE", "$4.24", "24", "$101.76"},
{" VRX", "$27.07", "0", "$0.00"},
{" PFE", "$30.07", "0", "$0.00"},
{" CRC", "$1.05", "8", "$8.40"},
{" GGB", "$1.82", "0", "$0.00"},
{" CHK", "$4.01", "6", "$24.06"},
{" T", "$39.37", "0", "$0.00"},
{" F", "$13.35", "5", "$66.75"},
{" WLL", "$7.66", "0", "$0.00"},
},
new String[] {
"New column", "New column", "New column", "New column"
}
));
table.setBorder(new BevelBorder(BevelBorder.LOWERED, null, null, null, null));
table.setBounds(350, 51, 395, 313);
frmBgszStockSimulator.getContentPane().add(table);
JTextArea txtrValue = new JTextArea();
txtrValue.setText("Displays Cash Value");
txtrValue.setLineWrap(true);
txtrValue.setEditable(false);
txtrValue.setBounds(99, 12, 172, 22);
frmBgszStockSimulator.getContentPane().add(txtrValue);
JTextArea txtrCurrentPortfolioValue = new JTextArea();
txtrCurrentPortfolioValue.setText("Display Portfolio Value");
txtrCurrentPortfolioValue.setLineWrap(true);
txtrCurrentPortfolioValue.setEditable(false);
txtrCurrentPortfolioValue.setBounds(376, 12, 206, 22);
frmBgszStockSimulator.getContentPane().add(txtrCurrentPortfolioValue);
JLabel lblCashValue = new JLabel("Cash Value:");
lblCashValue.setBounds(24, 15, 111, 16);
frmBgszStockSimulator.getContentPane().add(lblCashValue);
JLabel lblPortfolioValue = new JLabel("Portfolio Value:");
lblPortfolioValue.setBounds(283, 15, 123, 16);
frmBgszStockSimulator.getContentPane().add(lblPortfolioValue);
}
}
/* private class customListener implements ActionListener {
private GUIroughdraft window;
public customListener(GUIroughdraft window) {
this.window = window;
}
public void actionPerformed(ActionEvent e) {
String userInput = window.searchBar.getText();
GetStockData gd = new GetStockData();
try {
gd.pullPriceData(userInput);
} catch (IOException er) {
er.printStackTrace();
}
String output = Double.toString(gd.getPrice());
window.displayBox.setText("The Price for " + userInput + ":" + output);
}
}*/
关于java - 我正在使用操作监听器创建一个新的 JFrame，但无法更改背景颜色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36972675/