Package g1101_1200.s1115_print_foobar_alternately

Class FooBar

java.lang.Object

g1101_1200.s1115_print_foobar_alternately.FooBar

public class FooBar
extends Object

1115 - Print FooBar Alternately.<p>Medium</p> <p>Suppose you are given the following code:</p> <p>class FooBar { public void foo() { for (int i = 0; i < n; i++) { print(&ldquo;foo&rdquo;); } } public void bar() { for (int i = 0; i < n; i++) { print(&ldquo;bar&rdquo;); } } }</p> <p>The same instance of <code>FooBar</code> will be passed to two different threads:</p> <ul> <li>thread <code>A</code> will call <code>foo()</code>, while</li> <li>thread <code>B</code> will call <code>bar()</code>.</li> </ul> <p>Modify the given program to output <code>&quot;foobar&quot;</code> <code>n</code> times.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> n = 1</p> <p><strong>Output:</strong> &ldquo;foobar&rdquo;</p> <p><strong>Explanation:</strong> There are two threads being fired asynchronously. One of them calls foo(), while the other calls bar(). &ldquo;foobar&rdquo; is being output 1 time.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> n = 2</p> <p><strong>Output:</strong> &ldquo;foobarfoobar&rdquo;</p> <p><strong>Explanation:</strong> &ldquo;foobar&rdquo; is being output 2 times.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= n <= 1000</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
FooBar(int n)

Method Summary

Modifier and Type	Method	Description
void	bar(Runnable printBar)
void	foo(Runnable printFoo)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FooBar

public FooBar(int n)

Method Details

foo

public void foo(Runnable printFoo)
         throws InterruptedException

Throws:

InterruptedException

bar

public void bar(Runnable printBar)
         throws InterruptedException

Throws:

InterruptedException