Java inheritance Disassembly class A {} execution result

Source:

 Public class Explorationjdksource {    /**     @param  args     * / Public    staticvoid  main (string[] args) {        System.out.println ( New A ());}    } class a{}

Results:

The result of the source code execution javap-c explorationjdksource.class command disassembly:

Cause Analysis:

In fact, in the instance, the main method actually calls the

public void println (Object x), which internally invokes the valueof () method of the String class.

The Object.ToString method is also called Inside the ValueOf () method:

Public String toString ()

{

Return GetClass (). GetName () + "@" +integer.tohexstring (hashcode ());

}

The Hashcode () method is a local method, and the JVM designer implements:

public native int hashcode ();

Java inheritance Disassembly class A {} execution result