Fix Java Heap Space Error

If a “Java heap space” error occurs in a Java program, it means that the Java heap memory is insufficient. The problem can be resolved by taking the following steps:

1. Increasing the size of the Java heap memory: You can increase the size of the heap memory by setting the Java Virtual Machine parameter -Xmx. For example, -Xmx2g indicates setting the heap memory to 2GB. You can adjust the memory size according to specific situations.
2. Optimize program memory usage: Review the code for any memory leaks or excessive memory usage. Utilize analysis tools like Profiler to identify memory leaks and promptly release any unused objects.
3. Reorganize the program logic: If the program deals with a large amount of data, consider processing it in batches to avoid loading all data into memory at once.
4. Utilize more efficient data structures: If the program makes extensive use of List, Map, and other data structures, consider using more efficient alternatives, such as replacing LinkedList with ArrayList.
5. Limiting the number of objects: If a program creates a large number of objects, consider restricting the number of objects and freeing up those that are no longer being used.
6. Optimizing JVM garbage collection mechanism: Memory usage can be optimized by adjusting the garbage collection mechanism of JVM. For example, you can adjust the GC algorithm, heap memory allocation strategy, etc.

The above are some common solutions, but the specific method should be adjusted according to the specific situation.