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package Thread;import org.apache.commons.lang3.ArrayUtils;import java.util.ArrayList;import java.util.List;/** * @author xiaobu * @version JDK1.8.0_171 * @date on  2018/10/19 9:13 * @descrption  多个线程操作数组 */public class Test_4 {    public synchronized void handleList(List
   
     data, int threadNum) {        int length = data.size();        //如果线程个数不能被整除则多加个线程来处理剩余的数据        int t=length%threadNum==0?length/threadNum:length/(threadNum-1);        for(int i=0;i
    
     length?length:end);            new Thread(handleThread).start();        }    }    public class HandleThread implements Runnable{        private String name;        private List
     
       data;        private int start;        private int end;        public HandleThread(String name, List
      
        data, int start, int end) {            this.name=name;            this.data=data;            this.start = start;            this.end = end;        }        @Override        public void run() {            data.subList(start,end).add("^&*");            System.out.println("线程："+name);        }    }    public static void main(String[] args) {        long time1 = System.currentTimeMillis();        List
       
         data=new ArrayList<>();        for (int i = 0; i <50000 ; i++) {            data.add("item"+i);        }        Test_4 test_4 = new Test_4();        test_4.handleList(data,5);        System.out.println(ArrayUtils.toString(data));        System.out.println("耗时："+(System.currentTimeMillis()-time1)/1000+" s");    }}
       
      
     
    
   

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