Java8新特性-014-传统时间API的线程安全问题

测试代码

package java8.time;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class TestTimeApi {
    
    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        
        // 新建一个线程池
        ExecutorService pool = Executors.newFixedThreadPool(10);
        
        // 处理
        Callable task = new Callable() {
            @Override
            public Date call() throws Exception {
                return sdf.parse("2018年01月20日");
            }
        };
        
        // 存储集合
        List> results = new ArrayList<>();
        
        for (int i = 0; i < 10; i++) {
            results.add(pool.submit(task));
        }
        
        results.forEach((e) -> {
            try {
                System.out.println(e.get());
            } catch (InterruptedException e1) {
                e1.printStackTrace();
            } catch (ExecutionException e1) {
                e1.printStackTrace();
            }
        });
        
        // 关闭线程池
        pool.shutdown();
    }
    /*
     * 结果：
     * java.util.concurrent.ExecutionException: java.lang.NumberFormatException
     */
    
}

将出现异常：java.util.concurrent.ExecutionException: java.lang.NumberFormatException: For input string: ""

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