Java1-孔德林1507084235

[onli-alin]

删羊

int a = sheepList.size() - 1;
for(int i=sheepList.size() - 1 ; i >= a - 3 ; i --){
        sheepList.remove(i);
}
System.out.println(sheepList);

创建文件

    File fe = new File("b://leihous");
    try{
    if(!fe.exists()){
        fe.mkdir();
    }
    FileOutputStream nu = null;
    File file = null;
    for(int i = 1;i <= 10;i++){
        file = new File(fe,"HelloWorld"+i+".txt");
        nu = new FileOutputStream(file);
        if(!file.exists()){
            file.createNewFile();
        }
        String str ="我真 "+i;
        byte[]  b = str.getBytes();
        nu.write(b);
        nu.flush();
        nu.close();
    }
}catch(IOException  e){
    e.printStackTrace();
}
}
}

thread和runnable的区别

//thread是单继承，runnable可以多个线程同时处理同一个变量

private int ticket = 10;  
private String name;  
public MyThread(String name){  
    this.name =name;  
}  

public void run(){  
    for(int i =0;i<500;i++){  
        if(this.ticket>0){  
            System.out.println(this.name+"卖票---->"+(this.ticket--));  
        }  
    }  
}  
}  


public static void main(String[] args) {  
    MyThread mt1= new MyThread("一号窗口");  
    MyThread mt2= new MyThread("二号窗口");  
    MyThread mt3= new MyThread("三号窗口");  
    mt1.start();  
    mt2.start();  
    mt3.start();  
}  

}

private int ticket = 10;  
private String name;  
public MyThread(String name){  
    this.name =name;  
}  

public void run(){  
    for(int i =0;i<500;i++){  
        if(this.ticket>0){  
            System.out.println(this.name+"卖票---->"+(this.ticket--));  
        }  
    }  
}  

}

public static void main(String[] args) {  
    MyThread mt1= new MyThread("一号窗口");  
    MyThread mt2= new MyThread("二号窗口");  
    MyThread mt3= new MyThread("三号窗口");  
    mt1.start();  
    mt2.start();  
    mt3.start();  
}  
}  



private int ticket =10;  
private String name;  
public void run(){  
    for(int i =0;i<500;i++){  
        if(this.ticket>0){  
            System.out.println(Thread.currentThread().getName()+"卖票---->"+(this.ticket--));  
        }  
    }  
}  
 }  


public static void main(String[] args) {  
    // TODO Auto-generated method stub  
    //设计三个线程  
     MyThread1 mt = new MyThread1();  
     Thread t1 = new Thread(mt,"一号窗口");  
     Thread t2 = new Thread(mt,"二号窗口");  
     Thread t3 = new Thread(mt,"三号窗口");  
    //MyThread1 mt2 = new MyThread1();  
    //MyThread1 mt3 = new MyThread1();  
     t1.start();  
     t2.start();  
     t3.start();  
}