测试

test/com/platform/test/MapTest.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import org.junit.Test;
 
@@ -81,12 +82,24 @@ public class MapTest {
 	
 	@Test
 	public void test2() {
-		Map<String, String> map = new HashMap<String, String>();
-		map.put("12", "0");
-		if ("0".equals(map.get("12"))) {
-			System.out.println("-----");
+		Map<String, CheckoutEntity> map = new HashMap<String, CheckoutEntity>();
+		CheckoutEntity t = new CheckoutEntity();
+		t.setId(21);
+		map.put("12", t);
+		map.put("13", t);
+		map.put("14", t);
+		Set<String> keys = map.keySet();
+		String tmpKey = "";
+		if (keys.size() > 0) {
+			tmpKey = keys.iterator().next();
+			System.out.println(tmpKey);
+		}
+		CheckoutEntity data = map.get(tmpKey);
+		map.remove(tmpKey);
+		if (null != data) {
+			
+			System.err.println(data.getId());
 		}
-
 	}
 
 }

test/com/platform/test/MyTestThread.java

@@ -1,18 +1,13 @@
 
 package com.platform.test;
 
-public class MyTestThread extends Thread{
+public class MyTestThread implements Runnable{
 	
-	public MyTestThread() {
-		this.setDaemon(true);
-	}
-
 	@Override
 	public void run() {
 		for (int i = 0; i < 1000; i++) {
-			System.out.println(i);
 			try {
-				Thread.sleep(5);
+				Thread.sleep(50);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
 				e.printStackTrace();

test/com/platform/test/testThread.java

@@ -1,12 +1,29 @@
 package com.platform.test;
 
+import com.platform.utils.ThreadVolume;
+
 
 public class testThread {
 	
 	public static void main(String[] args) {
 		MyTestThread thj = new MyTestThread();
-		thj.start();
-		System.err.println(thj.isDaemon());
+		Thread th = new Thread(thj,"test1");
+		th.setDaemon(true);
+		th.start();
+		System.err.println(th.isDaemon());
+		ThreadGroup group = Thread.currentThread().getThreadGroup();
+		System.err.println(group.getName());
+		int size = group.activeCount();
+		Thread[] slackList = new Thread[size];
+
+	    /* 获取根线程组的所有线程 */
+	    int actualSize = group.enumerate( slackList );
+	    
+	    Thread[] list = new Thread[actualSize];
+	    System.arraycopy( slackList, 0, list, 0, actualSize );
+	    for (Thread thread : list) {
+	    	System.err.println(thread.getName());
+		}
 	}
 
 }