What are some examples of data dependency in Java?

What are some examples of data dependency in Java?

Data dependency in Java occurs when the execution of one statement depends on the result of another. For example, if you have a variable that is assigned a value based on a calculation, any subsequent use of that variable is dependent on the calculation being completed first.

Can you give me a specific code example?

Sure! Here's a simple example:

int a = 5;
int b = a * 2; // b depends on the value of a
System.out.println(b);

In this case, the value of b is dependent on the value of a.

What about in loops?

Great question! In loops, data dependency can occur when the loop variable is modified. For example:

for (int i = 0; i < 10; i++) {
    int result = i * 2; // result depends on the current value of i
    System.out.println(result);
}

Here, each iteration's result depends on the current value of i.

Are there any performance implications?

Yes, data dependencies can impact performance, especially in parallel processing. If tasks are dependent on each other, it can lead to bottlenecks, as one task must wait for another to complete before it can proceed.