java 的线程相对c，c++来说基本是类似的，尤其是使用lamba都是非常快速的就能启动一个线程，相对于使用api来说，简化了很多。有几种方式可以使用：
1、使用静态内部类java的线程类可以直接从Runnable上继承，实现 run()函数即可
static Map v_map = new ConcurrentHashMap();
static class th1 implements Runnable{
public void run() {
for(int i = 0; i {
for (String value : v_map.values()) {
System.out.println("thread3 value = " + value);
}
}).start();
()->的写法开始流行了，这样看起来和用起来更简单了是不是？ 下面是所有代码，使用ConcurrentHashMap做实验，多个线程同时操作一个ConcurrentHashMap来演示：
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class threadclass {
static Map v_map = new ConcurrentHashMap();
static class th1 implements Runnable{
public void run() {
for(int i = 0; i {
for (String value : v_map.values()) {
System.out.println("thread3 value = " + value);
}
}).start();
}
}
输出： thread1 value = 0 thread1 value = 1 thread1 value = 2 thread1 value = 3 thread1 value = 4 thread2 value = 0 thread2 value = 1 thread1 value = 5 thread2 value = 2 thread2 value = 3 thread1 value = 6 thread2 value = 4 thread2 value = 5 thread1 value = 7 thread1 value = 8 thread2 value = 6 thread2 value = 7 thread1 value = 9 thread2 value = 8 thread2 value = 9 thread3 value = 0 thread3 value = 1 thread3 value = 2 thread3 value = 3 thread3 value = 4 thread3 value = 5 thread3 value = 6 thread3 value = 7 thread3 value = 8 thread3 value = 9
