Java object creation process

Java object creation process

1. When the JVM encounters an instruction to create a new object, it first checks whether the parameters of this instruction can be defined in a class in the constant pool. symbol reference. Then load this class;

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2. Allocate memory for the object.

One method is "pointer collision", another method is "free list", and the final commonly used method is "local thread buffer allocation (TLAB)";

3. Except for the object header, The object memory space is initialized to 0;

4. Make necessary settings for the object header.

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