Java code



    public class ThreadFriendly {
    ThreadLocal<Value> threadLocalPart = new ThreadLocal<Value>();
    class Value{
    final int i;
    Value(int i){
    this.i = i;
    }
    }

    ThreadFriendly setThreadVal(int i){
    threadLocalPart.set(new Value(i));
    return this;
    }

    int getThreadVal(){
    return threadLocalPart.get().i;
    }

    public static void main(String[] args) {
    int sum = 0;
    for(int i = -500000;i<=500000;i++){
    sum+= new ThreadFriendly().setThreadVal(i).getThreadVal();
    }
    System.out.println(sum);
    }
    }





问题：打印结果是什么？

Java code



    public class ThreadFriendly {
    ThreadLocal<Value> threadLocalPart = new ThreadLocal<Value>();
    class Value{
    final int i;
    Value(int i){
    this.i = i;
    }
    }

    ThreadFriendly setThreadVal(int i){
    threadLocalPart.set(new Value(i));
    return this;
    }

    int getThreadVal(){
    return threadLocalPart.get().i;
    }

    public static void main(String[] args) {
    int sum = 0;
    for(int i = -500000;i<=500000;i++){
    sum+= new ThreadFriendly().setThreadVal(i).getThreadVal();
    }
    System.out.println(sum);
    }
    }





问题：打印结果是什么？