java中有几种方法可以实现一个线程

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两种实现方法，分别是继承Thread类与实现Runnable接口

package ThreadDemo;public class Thread1 {        private int j;        public Thread1(int j) {            this.j = j;        }        private synchronized void inc() {            j++;            System.out.println(j + "--Inc--" + Thread.currentThread().getName());        }        private synchronized void dec() {            j--;            System.out.println(j + "--Dec--" + Thread.currentThread().getName());        }        public void go() {            (new Dec()).start();            new Thread(new Inc()).start();            (new Dec()).start();            new Thread(new Inc()).start();        }        class Dec extends Thread {            public void run() {                for (int i = 0; i < 10; i++) {                    dec();                }            }        }        class Inc implements Runnable {            public void run() {                for (int i = 0; i < 10; i++) {                    inc();                }            }        }        public static void main(String args[]){            (new Thread1(5)).go();        }}

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