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Commit6b52a0f

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sample thread example
1 parent0408832 commit6b52a0f

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2 files changed

+124
-0
lines changed

2 files changed

+124
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packagesporadic.thread;
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publicclassHusbandAndWifeJobimplementsRunnable {
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/*
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* (non-Javadoc)
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*
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* @see java.lang.Runnable#run()
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*/
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@Override
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publicvoidrun() {
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for (inti =0;i <10;i++) {
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makeWithdrawl(10);
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if (bankAccount.getBalance() <0) {
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System.out.println("Overdrawn!!!");
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}
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}
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}
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privateBankAccountbankAccount =newBankAccount();
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/**synchronized is the key here to let one thread finish, and then let the other thread to kick in.
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* Without synchronized this keyword, two threads will invoke this method randomly based on how the OS
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* scheduler schedules it.*/
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privatesynchronizedvoidmakeWithdrawl(intamount) {
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if (bankAccount.getBalance() >=amount) {
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System.out.println(Thread.currentThread().getName() +" is about to withdraw: " +amount);
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try {
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System.out.println(Thread.currentThread().getName() +" is going to sleep.");
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Thread.sleep(1000);
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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System.out.println(Thread.currentThread().getName() +" woke up.");
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bankAccount.withdraw(amount);
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System.out.println(Thread.currentThread().getName() +" finished withdrawl: " +amount +"\t now the balance is: " +bankAccount.getBalance());
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}else {
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System.out.println("Sorry, not enough balance for " +Thread.currentThread().getName());
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}
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}
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/**
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* @param args
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*/
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publicstaticvoidmain(String[]args) {
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HusbandAndWifeJobhusbandAndWifeJob =newHusbandAndWifeJob();
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Threadhusband =newThread(husbandAndWifeJob);
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Threadwife =newThread(husbandAndWifeJob);
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husband.setName("Steve Sun");
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wife.setName("Sophie Yan");
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wife.start();
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husband.start();
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System.out.println("Program ended.\n\n\n\n\n\n");
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}
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}
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classBankAccount {
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privateintbalance =100000;
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publicintgetBalance() {
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returnbalance;
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}
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publicvoidwithdraw(intwithdrawAmount) {
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balance =balance -withdrawAmount;
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}
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}
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packagesporadic.thread;
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/** This is a cool and small program to show that threads don't run in the order that you can control, it's all scheduled by the thing called
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* Thread Scheduler.*/
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publicclassThreadIsCoolimplementsRunnable{
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publicstaticvoidmain(String []args){
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ThreadIsCoolthreadIsCool =newThreadIsCool();
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Threadabc =newThread(threadIsCool);
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Threaddef =newThread(threadIsCool);
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Threadghi =newThread(threadIsCool);
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abc.setName("abc");
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def.setName("def");
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ghi.setName("ghi");
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System.out.println("Now the three threads kick off:");
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abc.start();
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try {
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/* Start second thread(def) only when first thread(abc) is dead*/
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abc.join();
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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def.start();
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try {
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def.join();
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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ghi.start();
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try {
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ghi.join();
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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System.out.println("Now the Program ended.");
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}
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@Override
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publicvoidrun(){
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for(inti =0;i <5;i++){
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StringthreadName =Thread.currentThread().getName();
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System.out.println(threadName +" is running!");
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}
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System.out.println(Thread.currentThread().getName() +" is sleeping for 3 seconds");
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try {
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Thread.sleep(3000);
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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}
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}

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