问题描述
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，但不同以足以保证新类。）我认为问题违反了EDT规则，但我在其上看到的所有示例都涉及到论点。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。
Right now, my main just calls a gui with 10 rows. Based on how many of those rows have text, 1 of 9 classes is called (two rows must have text). The called class performs calculations that I'd like to have the progress bar tied to. Here is an example of one of the called classes (each class is similar, but different enough to warrant a new class.) I believe the problem is a violation of EDT rules, but all the examples I've seen on them involve a main argument. The frame appears when the code is run, but the progress bar doesn't update until all calculations are completed.
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
推荐答案
非常适合这种情况。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。您可以在合适的构造函数。
SwingWorker is ideal for this. The example below performs a simple iteration in the background, while reporting progress and intermediate results in a window. You can pass whatever parameters you need in a suitable SwingWorker constructor.
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();
}
});
}
}
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