java对象是怎么在jvm中new出来的，在内存中查看java对象成员变量字段属性值

news2024/11/27 3:54:51

java对象是怎么在jvm中new出来的

查看java对象字段属性在内存中的值

java 对象创建流程

附上java源码

public class MiDept {

    private int innerFiled=999;

    public MiDept()  {
        System.out.println("new MiDept--------------");
    }

    public String show(int data) {
        System.out.println("mi--------------"+data);
        return "yym-invoke-method";
    }

    public int getInnerFiled() {
        return innerFiled;
    }

    public void setInnerFiled(int innerFiled) {
        this.innerFiled = innerFiled;
    }
}


public class GDBDebugJava {

    public static int static_field = 8888;
    MiDept miDept0=null;
    MiDept miDept1=null;
    MiDept miDept2=null;

    public static void main(String[] args) {
        GDBDebugJava gDBDebugJava = new GDBDebugJava();
        int i=0;
        try {
            TimeUnit.SECONDS.sleep(1);
            System.out.println("mi"+i++);
        }catch (Exception e) {
            e.printStackTrace();
        }
        Thread.currentThread().setName("yym");
        gDBDebugJava.miDept0 = new MiDept();
        gDBDebugJava.miDept0.setInnerFiled(666);
        System.out.println(gDBDebugJava.miDept0.show(123456));

    }


}

1、分配java对象内存 jvm源代码oop obj = klass->allocate_instance(CHECK);