JDK1.8源码阅读笔记之java.lang.Thread

类的定义

public class Thread implements Runnable

初始化函数

private void init(ThreadGroup g, Runnable target, String name,
long stackSize) {
init(g, target, name, stackSize, null, true);
}

private void init(ThreadGroup g, Runnable target, String name,
long stackSize, AccessControlContext acc,
boolean inheritThreadLocals)

构造函数

• 无参

public Thread() {
init(null, null, "Thread-" + nextThreadNum(), 0);
}

• 带一个参数

public Thread(Runnable target) {
init(null, target, "Thread-" + nextThreadNum(), 0);
}

​​Runnable：线程回调后的目标对象​​

• 带一个参数，可以指定线程名称

/**
* Allocates a new {@code Thread} object. This constructor has the same
* effect as {@linkplain #Thread(ThreadGroup,Runnable,String) Thread}
* {@code (null, null, name)}.
*
* @param name
* the name of the new thread
*/
public Thread(String name) {
init(null, null, name, 0);
}

• 带两个参数的构造函数

Thread(Runnable target, AccessControlContext acc) {
init(null, target, "Thread-" + nextThreadNum(), 0, acc, false);
}

参数

说明

ThreadGroup group

线程组

String name

线程名

• 带三个参数的构造函数

public Thread(ThreadGroup group, Runnable target, String name) {
init(group, target, name, 0);
}

参数

说明

ThreadGroup group

线程组

Runnable target

线程回调后的目标对象

String name

线程名

• 带四个参数的构造函数

参数

线程组

Runnable target

线程回调后的目标对象

String name

线程名

long stackSize

线程堆栈大小

总结：Thread构造函数都是通过调用init函数进行初始化