public class SyncBlock {
  static class DataWrap {
    int i;
  }
  
  static class SyncBlockThread extends Thread {
    private DataWrap date;
    
    public SyncBlockThread(DataWrap dataWrap) {
      this.date = dataWrap;
    }
    
    @Override
    public void run() {
      
      for (int i = 0; i < 10; i++) {
        synchronized (date) {
          date.i++;
          try {
            sleep(1);
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          System.out.println(getName() + " " + date.i);
        }
      }
    }
  }
  
  public static void main(String[] args) {
    //多线程实现变量i依次加一输出
    DataWrap dataWrap = new DataWrap();
    
    new SyncBlockThread(dataWrap).start();
    new SyncBlockThread(dataWrap).start();
    new SyncBlockThread(dataWrap).start();
  }

}

public class SyncMethod {
  
  static class DataWrap{
    int i;
    
    public synchronized void valueGrow(){
      i++;
      
      try {
        Thread.sleep(1);
      } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      System.out.println(Thread.currentThread().getName() + " " + i);
    }
  }
  
  static class SyncMethodThread extends Thread {
    DataWrap dataWrap;
    
    public SyncMethodThread(DataWrap dataWrap){
      this.dataWrap = dataWrap;
    }
    
    @Override
    public void run() {
      for (int i = 0; i < 10; i++) {
        dataWrap.valueGrow();  
      }
    }
  }
  
  public static void main(String[] args) {
    //实现顺序增长并输出Datawrap中的i
    
    DataWrap dataWrap = new DataWrap();
    
    new SyncMethodThread(dataWrap).start();
    new SyncMethodThread(dataWrap).start();
    new SyncMethodThread(dataWrap).start();
  }

}

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class SyncLock {

  static class DataWrap{
    Lock lock = new ReentrantLock();
    int i;
    
    public void valueGrow(){
      lock.lock();
      try {
        i++;
        
        try {
          Thread.sleep(1);
        } catch (InterruptedException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
        System.out.println(Thread.currentThread().getName() + " " + i);  
      } finally {
        lock.unlock();
      }
      
    }
  }
  
  static class SyncLockThread extends Thread {
    DataWrap dataWrap;
    
    public SyncLockThread(DataWrap dataWrap){
      this.dataWrap = dataWrap;
    }
    
    @Override
    public void run() {
      for (int i = 0; i < 10; i++) {
        dataWrap.valueGrow();  
      }
    }
  }
  
  public static void main(String[] args) {
    //实现顺序增长并输出Datawrap中的i
    
    DataWrap dataWrap = new DataWrap();
        
    new SyncLockThread(dataWrap).start();
    new SyncLockThread(dataWrap).start();
    new SyncLockThread(dataWrap).start();
  }

}