Java SwingWorker-传递参数并返回ArrayList<；对象>；
注意：SSCCE在这个问题的末尾 我是新来的Java SwingWorker-传递参数并返回ArrayList<；对象>；,java,swing,swingworker,Java,Swing,Swingworker,注意：SSCCE在这个问题的末尾 我是新来的SwingWorker，所以请容忍我 我使用的是GUI，当用户按下按钮时，它会执行我在另一个类中使用的一些方法。这个类里面只有方法，我需要这些方法在它们自己的线程上运行。问题是，这些方法需要被传递参数，它们还将向其他方法返回所需的内容 大概是这样的： public class MyClass { public ArrayList<Train> proccessTrain(int endTime, int startTime, Ar
SwingWorkerpublic class MyClass {
public ArrayList<Train> proccessTrain(int endTime, int startTime, ArrayList<Train> trainList)
{
(... I start processing data here... with sets and gets to the stationDataList array...)
return trainList;
}
public int getNumberOfCrashes(ArrayList<Train> trainList)
{
(... I run over the array... do some comparasions... and do some sets on the Train object in the array...)
return numOfCrashes;
}
}
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class MainFrame extends JFrame {
private JLabel countLabel1 = new JLabel("0");
private JLabel statusLabel = new JLabel("Task not completed.");
private JButton startButton = new JButton("Start");
private ArrayList<Train> trainList = new ArrayList<>();
private ArrayList<Train> processedTrains = new ArrayList<>();
public MainFrame(String title) {
super(title);
setLayout(new GridBagLayout());
countLabel1.setFont(new Font("serif", Font.BOLD, 28));
GridBagConstraints gc = new GridBagConstraints();
gc.fill = GridBagConstraints.NONE;
gc.gridx = 0;
gc.gridy = 0;
gc.weightx = 1;
gc.weighty = 1;
add(countLabel1, gc);
gc.gridx = 0;
gc.gridy = 1;
gc.weightx = 1;
gc.weighty = 1;
add(statusLabel, gc);
gc.gridx = 0;
gc.gridy = 2;
gc.weightx = 1;
gc.weighty = 1;
add(startButton, gc);
Train t1 = new Train();
t1.setId(1);
t1.setName("John");
Train t2 = new Train();
t2.setId(2);
t2.setName("Mark");
Train t3 = new Train();
t3.setId(3);
t3.setName("Lewis");
trainList.add(t1);
trainList.add(t2);
trainList.add(t3);
startButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
TrainMethods tm = new TrainMethods();
// How can the swing worker return the array from the
// processTrains method to this processedTrains array
processedTrains = tm.processTrains(trainList);
for(int i = 0; i<processedTrains.size(); i++)
{
System.out.println("Train id: " + processedTrains.get(i).getId()
+ " Train Name: " + processedTrains.get(i).getName());
}
}
});
setSize(200, 400);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
private class Train
{
String name;
int id;
public void setName(String name) {
this.name = name;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public int getId() {
return id;
}
}
private class TrainMethods
{
public ArrayList processTrains(ArrayList<Train> trainList)
{
// Add here a SwingWorker to create a new thread
// and execute the following code and update later on
// a progress bar
for(int i = 0; i<trainList.size(); i++)
{
trainList.get(i).setName("No name");
}
return trainList;
}
}
}
导入java.awt.Font；
导入java.awt.GridBagConstraints；
导入java.awt.GridBagLayout；
导入java.awt.event.ActionEvent；
导入java.awt.event.ActionListener；
导入java.util.ArrayList；
导入javax.swing.JButton；
导入javax.swing.JFrame；
导入javax.swing.JLabel；
公共类大型机扩展JFrame{
私有JLabel countLabel1=新JLabel（“0”）；
私有JLabel statusLabel=新JLabel（“任务未完成”）；
私有JButton startButton=新JButton（“开始”）；
private ArrayList trainList=new ArrayList（）；
private ArrayList processedTrains=新建ArrayList（）；
公共主机（字符串标题）{
超级（标题）；
setLayout（新的GridBagLayout（））；
countLabel1.setFont（新字体（“衬线”，Font.BOLD，28））；
GridBagConstraints gc=新的GridBagConstraints（）；
gc.fill=GridBagConstraints.NONE；
gc.gridx=0；
gc.gridy=0；
gc.weightx=1；
gc.weighty=1；
添加（countLabel1，gc）；
gc.gridx=0；
gc.gridy=1；
gc.weightx=1；
gc.weighty=1；
添加（状态标签，gc）；
gc.gridx=0；
gc.gridy=2；
gc.weightx=1；
gc.weighty=1；
添加（启动按钮，gc）；
t1列=新列车（）；
t1.setId（1）；
t1.设定名称（“约翰”）；
t2列=新列车（）；
t2.setId（2）；
t2.设定名称（“标记”）；
t3列车=新列车（）；
t3.setId（3）；
t3.设定名称（“刘易斯”）；
列车列表。添加（t1）；
列车列表。添加（t2）；
列车列表。添加（t3）；
addActionListener（新ActionListener（））{
已执行的公共无效操作（操作事件arg0）{
TrainMethods tm=新的TrainMethods（）；
//swing worker如何从服务器返回数组
//将processTrains方法添加到此processedTrains数组
processedTrains=tm.processTrains（列车列表）；
对于（int i=0；i通常我不明白该代码如何帮助我，它没有显示如何按照我在问题中指定的方式传递和返回参数。或者我没有完全理解该答案？！请帮助您发布一个，然后问题可以对所有读者都清楚，从SwingWorker worker=new SwingWorker（）开始{
我不太明白这个问题：如果我的类应该由swingWorker控制，请将对实例的引用传递给worker？@mKorbel我刚刚根据要求添加了SSCCE。希望我现在说清楚，否则请让我知道，我会再次解释。
public ArrayList<Train> proccessTrain(int endTime, int startTime, ArrayList<Train> trainList)
{
SwingWorker<String, Integer> worker = new SwingWorker<String, String>() {
@Override
protected String doInBackground() throws Exception {
return
}
protected void done() {
}
@Override
protected void process(List<Integer> chunks) {
}
};
worker.execute();
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class MainFrame extends JFrame {
private JLabel countLabel1 = new JLabel("0");
private JLabel statusLabel = new JLabel("Task not completed.");
private JButton startButton = new JButton("Start");
private ArrayList<Train> trainList = new ArrayList<>();
private ArrayList<Train> processedTrains = new ArrayList<>();
public MainFrame(String title) {
super(title);
setLayout(new GridBagLayout());
countLabel1.setFont(new Font("serif", Font.BOLD, 28));
GridBagConstraints gc = new GridBagConstraints();
gc.fill = GridBagConstraints.NONE;
gc.gridx = 0;
gc.gridy = 0;
gc.weightx = 1;
gc.weighty = 1;
add(countLabel1, gc);
gc.gridx = 0;
gc.gridy = 1;
gc.weightx = 1;
gc.weighty = 1;
add(statusLabel, gc);
gc.gridx = 0;
gc.gridy = 2;
gc.weightx = 1;
gc.weighty = 1;
add(startButton, gc);
Train t1 = new Train();
t1.setId(1);
t1.setName("John");
Train t2 = new Train();
t2.setId(2);
t2.setName("Mark");
Train t3 = new Train();
t3.setId(3);
t3.setName("Lewis");
trainList.add(t1);
trainList.add(t2);
trainList.add(t3);
startButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
TrainMethods tm = new TrainMethods();
// How can the swing worker return the array from the
// processTrains method to this processedTrains array
processedTrains = tm.processTrains(trainList);
for(int i = 0; i<processedTrains.size(); i++)
{
System.out.println("Train id: " + processedTrains.get(i).getId()
+ " Train Name: " + processedTrains.get(i).getName());
}
}
});
setSize(200, 400);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
private class Train
{
String name;
int id;
public void setName(String name) {
this.name = name;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public int getId() {
return id;
}
}
private class TrainMethods
{
public ArrayList processTrains(ArrayList<Train> trainList)
{
// Add here a SwingWorker to create a new thread
// and execute the following code and update later on
// a progress bar
for(int i = 0; i<trainList.size(); i++)
{
trainList.get(i).setName("No name");
}
return trainList;
}
}
}