java查看当前项目所有线程列表界面【转】

java查看当前项目所有线程列表界面

1.TestThread(测试类)

package com.testdemo.pcis.isc.job.king.panel;

public class TestThread {
    public static void main(String[] args) {
        new Thread(){
            public void run() {
                try {
                    Thread.currentThread().sleep(10*1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            };
        }.start();
        
        new Thread(){
            public void run() {
                try {
                    Thread.currentThread().sleep(20*1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            };
        }.start();
        
        new Thread(){
            public void run() {
                try {
                    Thread.currentThread().sleep(30*1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            };
        }.start();
        
        ThreadViewer.showThreads();
    }
}

2.ThreadViewer(线程视图启动类)

package com.testdemo.pcis.isc.job.king.panel;  
import java.awt.*;  
import java.awt.event.*;  
import javax.swing.*;  
import javax.swing.table.*;  
public class ThreadViewer extends JPanel {  
    private ThreadViewerTableModel tableModel;  
    public ThreadViewer() {  
        tableModel = new ThreadViewerTableModel();  
        JTable table = new JTable(tableModel);  
        table.setAutoResizeMode(JTable.AUTO_RESIZE_LAST_COLUMN);  
        TableColumnModel colModel = table.getColumnModel();  
        int numColumns = colModel.getColumnCount();  
        // manually size all but the last column  
        for ( int i = 0; i < numColumns - 1; i++ ) {  
            TableColumn col = colModel.getColumn(i);  
            col.sizeWidthToFit();  
            col.setPreferredWidth(col.getWidth() + 5);  
            col.setMaxWidth(col.getWidth() + 5);  
        }  
        JScrollPane sp = new JScrollPane(table);  
        setLayout(new BorderLayout());  
        add(sp, BorderLayout.CENTER);  
    }  
    public void dispose() {  
        tableModel.stopRequest();  
    }  
    protected void finalize() throws Throwable {  
        dispose();  
    }  
    public static JFrame createFramedInstance() {  
        final ThreadViewer viewer = new ThreadViewer();  
        final JFrame f = new JFrame("ThreadViewer");  
        f.addWindowListener(new WindowAdapter() {  
                public void windowClosing(WindowEvent e) {  
                    f.setVisible(false);  
                    f.dispose();  
                    viewer.dispose();  
                }  
            });  
        f.setContentPane(viewer);  
        f.setSize(500, 300);  
        f.setVisible(true);  
        return f;  
    }  
      
    
    
    
    public static void showThreads() {  
        JFrame f = ThreadViewer.createFramedInstance();  
        // For this example, exit the VM when the viewer  
        // frame is closed.  
        f.addWindowListener(new WindowAdapter() {  
                public void windowClosing(WindowEvent e) {  
                    System.exit(0);  
                }  
            });  
        // Keep the main thread from exiting by blocking  
        // on wait() for a notification that never comes.  
        Object lock = new Object();  
        synchronized ( lock ) {  
            try {  
                lock.wait();  
            } catch ( InterruptedException x ) {  
            }  
        }  
    }  
    
    public static void main(String[] args) {  
        showThreads();
    }  
}  

3.ThreadViewerTableModel(线程视图编织类)

package com.isoftstone.pcis.isc.job.king.panel;  
import java.awt.*;  
import java.lang.reflect.*;  
import javax.swing.*;  
import javax.swing.table.*;  
public class ThreadViewerTableModel extends AbstractTableModel {  
    private Object dataLock;   
    private int rowCount;  
    private Object[][] cellData;  
    private Object[][] pendingCellData;  
    // the column information remains constant  
    private final int columnCount;  
    private final String[] columnName;  
    private final Class[] columnClass;  
    // self-running object control variables  
    private Thread internalThread;  
    private volatile boolean noStopRequested;  
    public ThreadViewerTableModel() {  
        rowCount = 0;  
        cellData = new Object[0][0];  
        // JTable uses this information for the column headers  
        String[] names = {   
            "Priority", "Alive",   
            "Daemon", "Interrupted",   
            "ThreadGroup", "Thread Name" };  
        columnName = names;                           
                          
        // JTable uses this information for cell rendering  
        Class[] classes = {   
            Integer.class, Boolean.class,   
            Boolean.class, Boolean.class,   
            String.class, String.class };  
        columnClass = classes;  
        columnCount = columnName.length;  
        // used to control concurrent access  
        dataLock = new Object();   
        noStopRequested = true;  
        Runnable r = new Runnable() {  
                public void run() {  
                    try {  
                        runWork();  
                    } catch ( Exception x ) {  
                        // in case ANY exception slips through  
                        x.printStackTrace();   
                    }  
                }  
            };  
        internalThread = new Thread(r, "ThreadViewer");  
        internalThread.setPriority(Thread.MAX_PRIORITY - 2);  
        internalThread.setDaemon(true);  
        internalThread.start();  
    }  
    private void runWork() {  
        // The run() method of transferPending is called by   
        // the event handling thread for safe concurrency.  
        Runnable transferPending = new Runnable() {  
                public void run() {  
                    transferPendingCellData();  
                    // Method of AbstractTableModel that   
                    // causes the table to be updated.  
                    fireTableDataChanged();   
                }  
            };  
        while ( noStopRequested ) {  
            try {  
                createPendingCellData();  
                SwingUtilities.invokeAndWait(transferPending);  
                Thread.sleep(2000);  
            } catch ( InvocationTargetException tx ) {  
                tx.printStackTrace();  
                stopRequest();  
            } catch ( InterruptedException x ) {  
                Thread.currentThread().interrupt();   
            }  
        }  
    }  
    public void stopRequest() {  
        noStopRequested = false;  
        internalThread.interrupt();  
    }  
    public boolean isAlive() {  
        return internalThread.isAlive();  
    }  
    private void createPendingCellData() {  
        // this method is called by the internal thread  
        Thread[] thread = findAllThreads();  
        Object[][] cell = new Object[thread.length][columnCount];  
        for ( int i = 0; i < thread.length; i++ ) {  
            Thread t = thread[i];  
            Object[] rowCell = cell[i];  
            rowCell[0] = new Integer(t.getPriority());  
            rowCell[1] = new Boolean(t.isAlive());  
            rowCell[2] = new Boolean(t.isDaemon());  
            rowCell[3] = new Boolean(t.isInterrupted());  
            rowCell[4] = t.getThreadGroup().getName();  
            rowCell[5] = t.getName();  
        }  
        synchronized ( dataLock ) {  
            pendingCellData = cell;  
        }  
    }  
    private void transferPendingCellData() {  
        // this method is called by the event thread  
        synchronized ( dataLock ) {  
            cellData = pendingCellData;  
            rowCount = cellData.length;  
        }  
    }  
    public int getRowCount() {  
        // this method is called by the event thread  
        return rowCount;  
    }  
      
    public Object getValueAt(int row, int col) {  
        // this method is called by the event thread  
        return cellData[row][col];  
    }  
    public int getColumnCount() {  
        return columnCount;  
    }  
    public Class getColumnClass(int columnIdx) {  
        return columnClass[columnIdx];  
    }  
    public String getColumnName(int columnIdx) {  
        return columnName[columnIdx];  
    }  
    public static Thread[] findAllThreads() {  
        ThreadGroup group =   
            Thread.currentThread().getThreadGroup();  
        ThreadGroup topGroup = group;  
        // traverse the ThreadGroup tree to the top  
        while ( group != null ) {  
            topGroup = group;  
            group = group.getParent();  
        }  
        // Create a destination array that is about  
        // twice as big as needed to be very confident  
        // that none are clipped.  
        int estimatedSize = topGroup.activeCount() * 2;  
        Thread[] slackList = new Thread[estimatedSize];  
        // Load the thread references into the oversized  
        // array. The actual number of threads loaded   
        // is returned.  
        int actualSize = topGroup.enumerate(slackList);  
        // copy into a list that is the exact size  
        Thread[] list = new Thread[actualSize];  
        System.arraycopy(slackList, 0, list, 0, actualSize);  
        return list;  
    }  
}     

 

4运行前后比对

运行前界面

 

运行后界面

http://blog.csdn.net/daditao/article/details/19811669