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法学研究Java 中的线程干扰错误
我们看一个示例，以了解线程干扰错误的概念：
示例
import java.io.*;
class Demo_instance{
static int val_1 = 6;
void increment_val(){
for(int j=1;j<11;j++){
val_1 = val_1 + 1;
System.out.println("The value of i after incrementing it is "+val_1);
}
}
void decrement_val(){
for(int j=1;j<11;j++){
val_1 = val_1 - 1;
System.out.println("The value of i after decrementing it is "+val_1);
}
}
}
public class Demo{
public static void main(String[] args){
System.out.println("Instance of Demo_instance created");
System.out.println("Thread instance created");
final Demo_instance my_inst = new Demo_instance();
Thread my_thread_1 = new Thread(){
@Override
public void run(){
my_inst.increment_val();
}
};
Thread my_thread_2 = new Thread(){
@Override
public void run(){
my_inst.decrement_val();
}
};
my_thread_1.start();
my_thread_2.start();
}
}输出
Instance of Demo_instance created Thread instance created The value of i after incrementing it is 7 The value of i after incrementing it is 7 The value of i after decrementing it is 6 The value of i after incrementing it is 8 The value of i after decrementing it is 7 The value of i after incrementing it is 8 The value of i after incrementing it is 8 The value of i after decrementing it is 7 The value of i after incrementing it is 9 The value of i after decrementing it is 8 The value of i after decrementing it is 7 The value of i after decrementing it is 6 The value of i after decrementing it is 5 The value of i after decrementing it is 4 The value of i after decrementing it is 3 The value of i after decrementing it is 2 The value of i after incrementing it is 3 The value of i after incrementing it is 4 The value of i after incrementing it is 5 The value of i after incrementing it is 6
类“Demo_instance”定义了一个静态值，和一个 void 函数“increment_val”，它会遍历一组数字，并对其进行递增并在控制台上显示。另一个名为“decrement_val”的函数会遍历一组数字，并每次进行递减并在控制台上显示输出。
类 Demo 包含一个主函数，该函数创建类的实例，并创建一个新线程。该线程已被重写，run 函数调用此对象实例。对于第二个线程，也执行了相同操作。这两个线程随后会被 start 函数调用。
更新于：2020 年 7 月 14 日
147 次浏览
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