<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
In Java, convert an integer array to a string.
[1, 2, 3, 4]<|im_end|>
<|im_start|>assistant
String str = Arrays.toString(arr); // [1, 2, 3, 4]<|im_end|>
