Java – how to avoid initialization of large arrays

I assigned a lot of doubles

double[] x = new double[ n ];

Where n is large, I want to avoid initialization to save time Is it possible?

Solution

Short answer: No, arrays are always cleared when they are created

If your analysis shows that this is a major bottleneck, you can consider retaining an array instance pool, and the length of each collection is greater than N. the problem is that you may need a wrapper object to contain the data array and the actual length used, because you can no longer use data length.