public class TraditionalSychronized {
???
??? /**
??? ?* @param args
??? ?*/
??? public static void main(String[] args) {
??? ??? new TraditionalSychronized().init();
??? ???
??? }
???
??? public void init() {
??? ???
??? ??? final Printer printer = new Printer();
??? ???
??? ??? new Thread() {
??? ??? ???
??? ??? ??? @Override
??? ??? ??? public void run() {
??? ??? ??? ???
??? ??? ??? ??? while (true) {
??? ??? ??? ??? ???
??? ??? ??? ??? ??? try {
??? ??? ??? ??? ??? ??? Thread.sleep(10);
??? ??? ??? ??? ??? } catch (InterruptedException e) {
??? ??? ??? ??? ??? ??? e.printStackTrace();
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? printer.print("youyang");
??? ??? ??? ??? }
??? ??? ??? ???
??? ??? ??? }
??? ??? ???
??? ??? }.start();
??? ???
??? ??? new Thread() {
??? ??? ???
??? ??? ??? @Override
??? ??? ??? public void run() {
??? ??? ??? ???
??? ??? ??? ??? while (true) {
??? ??? ??? ??? ???
??? ??? ??? ??? ??? try {
??? ??? ??? ??? ??? ??? Thread.sleep(10);
??? ??? ??? ??? ??? } catch (InterruptedException e) {
??? ??? ??? ??? ??? ??? e.printStackTrace();
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? printer.print("yusiyi");
??? ??? ??? ??? }
??? ??? ??? }
??? ??? ???
??? ??? }.start();
??? }
???
??? static class Printer {
??? ??? public void print(String string) {
??? ??? ??? //當線程運行到這里時,就會檢查this的鎖是否還在,在就獲取鎖,運行里面的代碼
??? ??? ??? //如果鎖不在,就等待,直到得到鎖
??? ??? ??? synchronized (this) {
??? ??? ??? ??? for (int i = 0; i < string.length(); i++) {
??? ??? ??? ??? ??? System.out.print(string.charAt(i));
??? ??? ??? ??? }
??? ??? ??? ??? System.out.println();
??? ??? ??? }
??? ??? }
??? ???
??? ??? //synchronized方法中用到的互斥對象也是this,所以print方法和print2方法能同步
??? ??? public synchronized void print2(String string) {
??? ??? ??? for (int i = 0; i < string.length(); i++) {
??? ??? ??? ??? System.out.print(string.charAt(i));
??? ??? ??? }
??? ??? ??? System.out.println();
??? ??? }
??? ???
??? ??? //static synchronized方法中用到的互斥對象就是類本身,即Printer.class,所以不能和print方法同步
??? ??? public static synchronized void print3(String string) {
??? ??? ??? for (int i = 0; i < string.length(); i++) {
??? ??? ??? ??? System.out.print(string.charAt(i));
??? ??? ??? }
??? ??? ??? System.out.println();
??? ??? }
??? }
???
}
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