现在，我的主要是用10行调用一个gui。根据这些行中有多少行有文本，调用9个类中的1个（两行必须有文本）。被调用的类执行计算，我希望将进度条绑定到。以下是其中一个被调用类的示例（每个类都相似，但足够不同以保证新类。）我认为这个问题违反了EDT规则，但我在其上看到的所有示例都涉及到一个主类。论点。代码运行时会出现框架，但在完成所有计算之前，进度条不会更新。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class twoLoan extends JFrame {
static JFrame progressFrame;
static JProgressBar progressBar;
static Container pane;
double amountSaved = 0;
int i = 0;
public void runCalcs(Double MP, Double StepAmt,
Double L1, Double L2, Double C1, Double C2,
Double IM1, Double IM2, Double M1Start, Double M2Start) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
}
int iterations = (int) (MP - (M1Start * M2Start));
//Create all components
progressFrame = new JFrame("Calculation Progress");
progressFrame.setSize(300, 100);
pane = progressFrame.getContentPane();
pane.setLayout(null);
progressFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
progressBar = new JProgressBar(0, iterations);
//Add components to pane
pane.add(progressBar);
//Position controls (X, Y, width, height)
progressBar.setBounds(10, 10, 280, 20);
//Make frame visible
progressFrame.setResizable(false); //No resize
progressFrame.setVisible(true);
double M1 = M1Start;
double M2 = M2Start;
// Set MinLoop as maximum to start
// Loan 1
double N1 = (Math.log10(1 - IM1 * L1 / M1) * -1) / Math.log10(1 + IM1);
double M1Sum = M1 * N1;
// Loan 2
double N2 = (Math.log10(1 - IM2 * L2 / M2) * -1) / Math.log10(1 + IM2);
double M2Sum = M2 * N2;
double minLoop = M1Sum + M2Sum;
double MTotal = 0;
// Define variables for mins
double MP1 = 0;
double MP2 = 0;
double NP1 = 0;
double NP2 = 0;
double MP1Sum = 0;
double MP2Sum = 0;
while (M1 <= MP - M2Start && M2 >= M2Start) {
N1 = (Math.log10(1 - IM1 * L1 / M1) * -1) / Math.log10(1 + IM1);
M1Sum = N1 * M1;
N2 = (Math.log10(1 - IM2 * L2 / M2) * -1) / Math.log10(1 + IM2);
M2Sum = N2 * M2;
MTotal = M1Sum + M2Sum;
if (MTotal < minLoop) {
minLoop = MTotal;
MP1 = M1;
MP2 = M2;
NP1 = N1;
NP2 = N2;
MP1Sum = M1Sum;
MP2Sum = M2Sum;
} // end if
M1 = M1 + StepAmt;
M2 = MP - M1;
// Reset monthly sums
M1Sum = 0;
M2Sum = 0;
i++;
progressBar.setValue(i);
progressBar.repaint();
if (i >= iterations) {
progressFrame.dispose();
}
} // end while
// if there's a value for current payments, calculate amount saved
if (C1 > 0) {
double CN1 = (Math.log10(1 - IM1 * L1 / C1) * -1) / Math.log10(1 + IM1);
double CT1 = CN1 * C1;
double CN2 = (Math.log10(1 - IM2 * L2 / C2) * -1) / Math.log10(1 + IM2);
double CT2 = CN2 * C2;
double CTotal = CT1 + CT2;
amountSaved = CTotal - minLoop;
}
} // end method runCalcs
//Workbook wb = new HSSFWorkbook();
public double savedReturn() {
return amountSaved;
}
} // end class twoLoans
答案 0 :(得分：30)
SwingWorker是理想的选择。下面的示例在后台执行简单迭代，同时在窗口中报告进度和中间结果。您可以在合适的SwingWorker构造函数中传递所需的任何参数。
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.text.DecimalFormat;
import java.util.List;
import javax.swing.*;
/** @see http://stackoverflow.com/questions/4637215 */
public class TwoRoot extends JFrame {
private static final String s = "0.000000000000000";
private JProgressBar progressBar = new JProgressBar(0, 100);
private JLabel label = new JLabel(s, JLabel.CENTER);
public TwoRoot() {
this.setLayout(new GridLayout(0, 1));
this.setTitle("√2");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.add(progressBar);
this.add(label);
this.setSize(161, 100);
this.setLocationRelativeTo(null);
this.setVisible(true);
}
public void runCalc() {
progressBar.setIndeterminate(true);
TwoWorker task = new TwoWorker();
task.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent e) {
if ("progress".equals(e.getPropertyName())) {
progressBar.setIndeterminate(false);
progressBar.setValue((Integer) e.getNewValue());
}
}
});
task.execute();
}
private class TwoWorker extends SwingWorker<Double, Double> {
private static final int N = 5;
private final DecimalFormat df = new DecimalFormat(s);
double x = 1;
@Override
protected Double doInBackground() throws Exception {
for (int i = 1; i <= N; i++) {
x = x - (((x * x - 2) / (2 * x)));
setProgress(i * (100 / N));
publish(Double.valueOf(x));
Thread.sleep(1000); // simulate latency
}
return Double.valueOf(x);
}
@Override
protected void process(List<Double> chunks) {
for (double d : chunks) {
label.setText(df.format(d));
}
}
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TwoRoot t = new TwoRoot();
t.runCalc();
}
});
}
}
答案 1 :(得分：4)
我认为你的预感是对的，你需要遵守Swing线程规则。
那该怎么办？
首先，我不确定您的应用是如何精确设计的。你说你有一个带有一堆行的主框架，并且可能每个都可以调用9个类中的一个，它们看起来都像上面那样。似乎这些类将生成自己的JFrame。我想这个新框架仅用于进度条。我会假设这是设计，并会相应地提出建议。
我建议您在Runnable的实例中执行一些操作，然后将这些Runnable实例放入SwingUtilities.invokeLater以使其在EDT上运行。与此同时，如果阅读，我会花时间重新组织您的代码。
public void createComponents () {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Create all components
progressFrame = new JFrame("Calculation Progress");
progressFrame.setSize(300, 100);
pane = progressFrame.getContentPane();
pane.setLayout(null);
progressFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
progressBar = new JProgressBar(0, iterations);
//Add components to pane
pane.add(progressBar);
//Position controls (X, Y, width, height)
progressBar.setBounds(10, 10, 280, 20);
//Make frame visible
progressFrame.setResizable(false); //No resize
progressFrame.setVisible(true);
}
});
}
private void updateProgressBar(final int i) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
progressBar.setValue(i);
//no need for the following
//progressBar.repaint();
}
});
}
private void killDialog() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
progressFrame.setVisible(false);
}
});
}
答案 2 :(得分：3)
感谢您的帮助。我开始尝试使用第一个响应，但是我无法让它同时运行，并且在程序结束时运行。我相信它会奏效，但我无法弄明白。使用trashgod的响应和其他一些示例，我能够使用SwingWorker使其工作。不幸的是，我并不完全理解它是如何工作的，但我现在就把它拿走。
运行计算的gui和方法首先在另一个类中调用：
iterations = (int) (MPay - (M1Start + M2Start));
twoLoan myLoan = new twoLoan();
myLoan.createGui(iterations);
myLoan.runCalcs(MPay, Step, L1, L2, C1, C2, IM1, IM2, M1Start, M2Start);
然后运行如下：
public class twoLoan extends JFrame {
JFrame progressFrame;
JProgressBar progressBar;
JLabel label = new JLabel("Calculating...");;
Container pane;
double amountSaved = 0;
int i = 0;
int iterations;
public void createGui(int iterations) {
//Create all components
progressFrame = new JFrame("Calculation Progress");
progressFrame.setSize(300, 100);
pane = progressFrame.getContentPane();
pane.setLayout(null);
label = new JLabel("Calculating...");
label.setBounds(115, 35, 200, 25);
progressBar = new JProgressBar(0, iterations);
progressBar.setBounds(10, 10, 280, 20);
progressBar.setStringPainted(true);
//Add components to pane
pane.add(progressBar);
pane.add(label);
//Make frame visible
progressFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
progressFrame.setResizable(false); //No resize
progressFrame.setLocationRelativeTo(null);
progressFrame.setVisible(true);
}
public void runCalcs (double MP, double StepAmt, double L1, double L2,
double C1, double C2, double IM1, double IM2, double M1Start, double M2Start) {
progressBar.setIndeterminate(false);
TwoWorker task = new TwoWorker(MP, StepAmt, L1, L2, C1, C2, IM1, IM2, M1Start, M2Start);
task.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent e) {
if ("progress".equals(e.getPropertyName())) {
progressBar.setIndeterminate(false);
progressBar.setValue((Integer) e.getNewValue());
}
}
});
task.execute();
} //end method runCalcs
public class TwoWorker extends SwingWorker<Double, Double> {
private final double MP, StepAmt,L1, L2,
C1, C2, IM1, IM2, M1Start, M2Start;
public TwoWorker(double MPa, double StepAmta, double L1a, double L2a,
double C1a, double C2a, double IM1a, double IM2a, double M1Starta, double M2Starta) {
MP = MPa;
StepAmt = StepAmta;
L1 = L1a;
L2 = L2a;
C1 = C1a;
C2 = C2a;
IM1 = IM1a;
IM2 = IM2a;
M1Start = M1Starta;
M2Start = M2Starta;
}
@Override
protected Double doInBackground() {
double M1 = M1Start;
double M2 = M2Start;
// Set MinLoop as maximum to start
// Loan 1
double N1 = (Math.log10(1 - IM1 * L1 / M1) * -1)/Math.log10(1 + IM1);
double M1Sum = M1 * N1;
// Loan 2
double N2 = (Math.log10(1 - IM2 * L2 / M2) * -1)/Math.log10(1 + IM2);
double M2Sum = M2 * N2;
double minLoop = M1Sum + M2Sum;
double MTotal = 0;
// Define variables for mins
double MP1 = 0;
double MP2 = 0;
double NP1 = 0;
double NP2 = 0;
double MP1Sum = 0;
double MP2Sum = 0;
while ( M1 <= MP - M2Start && M2 >= M2Start ) {
N1 = (Math.log10(1 - IM1 * L1 / M1) * -1)/Math.log10(1 + IM1);
M1Sum = N1 * M1;
N2 = (Math.log10(1 - IM2 * L2 / M2) * -1)/Math.log10(1 + IM2);
M2Sum = N2 * M2;
MTotal = M1Sum + M2Sum;
if (MTotal < minLoop) {
minLoop = MTotal;
MP1 = M1;
MP2 = M2;
NP1 = N1;
NP2 = N2;
MP1Sum = M1Sum;
MP2Sum = M2Sum;
} // end if
i++;
progressBar.setValue(i);
M1 = M1 + StepAmt;
M2 = MP - M1;
// Reset monthly sums
M1Sum = 0;
M2Sum = 0;
} // end while
System.out.printf("MP1 = %.2f\n", MP1);
System.out.printf("MP2 = %.2f\n", MP2);
System.out.printf("NP1 = %.2f\n", NP1);
System.out.printf("NP2 = %.2f\n", NP2);
System.out.printf("MP1Sum = %.2f\n", MP1Sum);
System.out.printf("MP2Sum = %.2f\n", MP2Sum);
System.out.printf("MTotal = %.2f\n", minLoop);
System.out.printf("i = %d\n",i);
System.out.printf("M1Start = %.2f\n", M1Start);
System.out.printf("M2Start = %.2f\n", M2Start);
System.out.printf("MP= %.2f\n",MP);
// if there's a value for current payments, calculate amount saved
if( C1 > 0 ) {
double CN1 = (Math.log10(1 - IM1 * L1 / C1) * -1)/Math.log10(1 + IM1);
double CT1 = CN1 * C1;
double CN2 = (Math.log10(1 - IM2 * L2 / C2) * -1)/Math.log10(1 + IM2);
double CT2 = CN2 * C2;
double CTotal = CT1 + CT2;
amountSaved = CTotal - minLoop;
} // end if
return null;
} // end doInBackGround
@Override
protected void done() {
label.setBounds(133, 35, 200, 25);
label.setText("Done!");
}
} // end TwoWorker
public double savedReturn() {
return amountSaved;
}
} // end class twoLoans