Write 2 threads, one print 1-52, one print a-Z, print order is 12a34b ... (Two synchronous methods using synchronous code block and synchronous method)

1. Synchronization method

Package synchronized;/************************************ Synchronization Method ****************************************/public Class Printtest {public static void main (string[] args) {print p = new Print (); Thread T1 = new Printnumber (p); Thread t2 = new Printword (p); T1.start (); T2.start ();}} Class Printnumber extends Thread {//print digital thread private print p;public printnumber (print p) {THIS.P = P;} public void Run () {for (int i = 0; i <; i++) {P.printnumber ();}}} Class Printword extends Thread {//print letter thread private print p;public Printword (print p) {THIS.P = P;} public void Run () {for (int i = 0; i <; i++) {P.printword ();}}} Class Print {//sync monitor is print class private int i = 1;private char j = ' A ';p ublic Print () {}public synchronized void P      Rintnumber () {//Sync method System.out.print (string.valueof (i) + string.valueof (i + 1)); i + = 2;notifyall (); Wake up other processes first, then block this process, and if the order is reversed, the process can no longer wake up other process try {wait ();} catch (Interruptedexception e) {e.printstacktrace ()}} Public synchronized void Printword () {System.out.print (j); j++;notifyall (); Try{if (J <= ' Z ')//output Z no more waiting. {Wait ();}} catch (Interruptedexception e) {e.printstacktrace ();}}}

2. Synchronizing the code block package Threaddemo;

/** * < Write two threads, one thread prints 1-52, another thread prints letters A-Z. Print order is 12a34b56c ... 5152z> * * * *
/***************************************** Synchronous code block *********************************************/public class        threaddemo{//test public static void main (string[] args) throws Exception {Object obj = new Object ();                Start two threads Thread1 t1 = new Thread1 (obj);                Thread2 t2 = new Thread2 (obj);        T1.start ();    T2.start ();        }}//a thread prints 1-52class Thread1 extends thread{private Object obj;    Public Thread1 (Object obj) {this.obj = obj; public void Run () {synchronized (obj) {//print 1-52 for (int i = 1; i < 53;                i++) {System.out.print (i + "");                    if (i% 2 = = 0) {//cannot forget to wake up other threads Obj.notifyall ();                    try {obj.wait ();              } catch (Interruptedexception e) {          E.printstacktrace (); }}}}}}//another thread printing letters A-zclass Thread2 extends thread{private Object o        bj    Public Thread2 (Object obj) {this.obj = obj;        The public void Run () {synchronized (obj)///synchronization monitor is the Obj class, and the synchronization code block is written in the Run method.  {//print A-Z for (int i = 0; i <; i++) {System.out.print (char) (' A ' +                i) + "");                Do not forget to wake up other threads Obj.notifyall ();                        try {///The last one Don't wait if (i! = 25) {                    Obj.wait ();                }} catch (Interruptedexception e) {e.printstacktrace (); }                            }                    }    }    }

Write 2 threads, one print 1-52, one print a-Z, print order is 12a34b ... (Two synchronous methods using synchronous code block and synchronous method)