A race condition occurs when two or more threads can access shared data and they try to change it at the same time.
Problem: When one thread is in check and act then other thread might change the value in between **check and act **resulting unusual result.
<pre><code class="lang-java">public synchronized lockResource(){
if (a == 10) // "Check" state
{
b = a * 2; // "Act" state
}
}
</code></pre>
If another thread changed a in between check and act b will not be equal to 20.
In order to prevent race conditions from occurring, we put a lock around the shared resource/data to ensure only one thread can access the data at a time.
<pre><code class="lang-java">public synchronized lockResource(){
if (a == 10)
{
b = a * 2;
}
}
//releases lock here
</code></pre>

A race condition occurs when two or more threads can access shared data and they try to change it at the same time.

Problem: When one thread is in check and act then other thread might change the value in between \*\*check and act \*\*resulting unusual result.

```java
public synchronized lockResource(){
if (a == 10) // "Check" state
{
b = a * 2; // "Act" state
}
}
```

If another thread changed a in between check and act b will not be equal to 20.

In order to prevent race conditions from occurring, we put a lock around the shared resource/data to ensure only one thread can access the data at a time.

```java
public synchronized lockResource(){
if (a == 10)
{
b = a * 2;
}
}
//releases lock here
```

Race Condition

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