问个java多线程加锁的问题

[loveghl]

大家好，下面的代码定义于一个更大的类class Program内，且变量totalNumNodes， 数组stat[]以及Object对象lock和lock_2也都定义于更大类class Program中，我已经对共享变量totalNumNodes和数组stat[]进行了加锁处理，可为什么每次运行函数OutputStat()的结果还是不一样呢？谢谢大家！

	
	
	public class MyThread extends Thread{
		private CountDownLatch threadsSignal;
		private int hsmapCapacity;
		private long forAndVal;
		private boolean DNAFormat;
		private long forAndVal32;
		
		public MyThread(CountDownLatch threadsSignal, int capacity, boolean DNAFormat){
			super();
			this.threadsSignal = threadsSignal; 
			this.hsmapCapacity = capacity;
			this.forAndVal = (long)Math.pow(2, 2*(k-32)) - 1;
			this.DNAFormat = DNAFormat;
			this.forAndVal32 = (long)Math.pow(2, 2*k) - 1;
		}
		
		@Override
		public void run(){
			System.out.println(Thread.currentThread().getName() + "Start..."); 
			
			FileReader fr;
			BufferedReader bfr;
			FileWriter fw = null;
			BufferedWriter bfw = null;
			DataOutputStream out = null;
			HashMap<Kmer,Integer> nodes = new HashMap<Kmer,Integer>(hsmapCapacity);
			
			String line;
			
			Random rd = new Random();
			int p,j;
			Kmer k1, k1_rev;
			
			
			try{
				File dir = new File("Maps(count)");
				if(!dir.exists())
					dir.mkdir();
				
				nodes.clear();
				
				while(blocks.cardinality()<numOfBlocks){
					
					p = rd.nextInt(numOfBlocks);
					
					while(blocks.get(p)==true)
						p = rd.nextInt(numOfBlocks);
					
					blocks.set(p);
					
					fr = new FileReader("Nodes/nodes"+p);
					bfr = new BufferedReader(fr, bufSize);
					if(DNAFormat){					
						fw = new FileWriter("Maps(count)/maps"+p);
						bfw = new BufferedWriter(fw, bufSize);
					}
					else{
					    out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(new File("Maps(count)/maps"+p)), bufSize));
					}
					while((line = bfr.readLine()) != null){					
						
						
						for(j = 0; j < line.length() - k + 1; j++){
				
							k1 = new Kmer(line.substring(j,k+j),false);
						k1_rev = new Kmer(line.substring(j,k+j),true);
							
							if(!nodes.containsKey(k1) && !nodes.containsKey(k1_rev)){
								nodes.put(k1, 1);							
							}
							else if(nodes.containsKey(k1)){
								nodes.put(k1, nodes.get(k1)+1);
							}
							else if(nodes.containsKey(k1_rev)){
								nodes.put(k1_rev, nodes.get(k1_rev)+1);
							}	
							
						}
					}
					
					Iterator<Entry<Kmer, Integer>> iter = nodes.entrySet().iterator(); 
					while (iter.hasNext()) { 
					     Entry<Kmer, Integer> entry = (Entry<Kmer, Integer>) iter.next();  
					     
					     if(!DNAFormat){
					    	 if(k > 32)
					    		 out.writeLong(entry.getKey().high);
					    	 out.writeLong(entry.getKey().low);
					    	 out.writeInt(entry.getValue());
					     }
					     else{
					    	 bfw.write(entry.getKey().toDNA(k)+"\t"+entry.getValue()+"\n");
					     }
					     
					     synchronized(lock){
					    	 stat[entry.getValue()]++;
					     }
					}
					
					synchronized(lock_2){
						totalNumNodes+=nodes.size();
					}
					
					nodes.clear();
					
					if(DNAFormat)
					{
						bfw.close();
						fw.close();
					}
					else
						out.close();
						
					bfr.close();
					fr.close();	
					
				}
							
			}catch(Exception E){
				System.out.println("Exception caught!");
				E.printStackTrace();
			}
			
			threadsSignal.countDown();  
			System.out.println(Thread.currentThread().getName() + "End. Remaining" + threadsSignal.getCount() + " threads");  
			
		}
	}
	
	private void BuildMap(int threadNum, int hsmapCapacity, boolean DNAFormat) throws Exception{
		CountDownLatch threadSignal = new CountDownLatch(threadNum);
		
		for(int i=0;i<threadNum;i++){
			Thread t = new MyThread(threadSignal, hsmapCapacity, DNAFormat);
			t.start();
		}
		threadSignal.await();
		System.out.println(Thread.currentThread().getName() + "End."); 
	}

        private void OutputStat() throws Exception{
		for(int i=1;i<=5000000;i++){
			if(stat[i]!=0){
				bfw_stat.write(i+"\t"+stat[i]+"\n");
			}
		}
		bfw_stat.close();
		fw_stat.close();
		
		System.out.println("Total num of nodes: "+totalNumNodes*2);
	}
		

[loveghl]

求助啊求助

[完美灬缺陷]

帮顶一下。

[TKD03072010]

好长的代码 ...

[loveghl]

恩，代码是有点长，但是我问的只是两个synchronized部分的啊

[loveghl]

[Quote=引用楼主 loveghl 的回复:]
大家好，下面的代码定义于一个更大的类class Program内，且变量totalNumNodes， 数组stat[]以及Object对象lock和lock_2也都定义于更大类class Program中，我已经对共享变量totalNumNodes和数组stat[]进行了加锁处理，可为什么每次运行函数OutputStat()的结果还是不一样呢？谢谢大家！Java code


……
[/Quote]

已解决

[hrc200808]

怎么解决的，能不能给个完整的代码，学习下，我正想弄个多线程的程序呢？谢谢QQ 363978765,
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