Java Program learning about javap Part 2- IProgramX

by - IProgram X on - June 29, 2018
Q. Compile sample program 2. Type the following command and view the bytecodes. javap -c MyClass.

Note: We haven't used the program mentioned in the question.

 Program:

class MyClass {  
  MyClass();  
  public static void main(java.lang.String[]);  

} 

Command:

 javap -c MyClass

 Output:

 class MyClass {  
  MyClass();  
    Code:  
       0: aload_0         
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V  
       4: return          
  
  public static void main(java.lang.String[]);  
    Code:  
       0: getstatic     #2                  // Field java/lang/System.out:Ljava/io/PrintStream;  
       3: ldc           #3                  // String hello java  
       5: invokevirtual #4                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V  
       8: return          

}  
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3 Comments

  1. nikitaJanuary 19, 2021 at 10:21 PM

    error

    ReplyDelete
  2. mr techzJanuary 5, 2023 at 10:10 AM

    Slip5_1: Write a program for multilevel inheritance such that Country is inherited from
    Continent.State is inherited from Country. Display the place, State, Country and Continent.
    import java.io.InputStreamReader;
    import java.io.BufferedReader;
    import java.io.IOException;
    class Continent{
    String con;
    InputStreamReader i = new InputStreamReader(System.in);
    BufferedReader r = new BufferedReader(i);
    void con_input() throws IOException
    {
    System.out.println("Enter the continent name:");
    con = r.readLine();
    }
    }
    class Country extends Continent
    {
    String cou;
    void cou_input()throws IOException
    {
    System.out.println("Enter the country name:");
    cou = r.readLine();}
    }
    class State extends Country
    {
    String sta;
    void sta_input()throws IOException
    {
    System.out.println("Enter the state name:");
    sta = r.readLine();}
    }
    class Main extends State
    {
    String pla;
    void pla_input()throws IOException
    {
    System.out.println("Enter the place name:");
    pla = r.readLine();}
    public static void main(String args[])throws IOException
    {
    Main s = new Main();
    s.con_input();
    s.cou_input();
    s.sta_input();
    s.pla_input();
    System.out.println("place is:"+s.pla);
    System.out.println("state is:"+s.sta);
    System.out.println("country is:"+s.cou);
    System.out.println("continent is:"+s.con);
    }
    }

    ReplyDelete
  3. HarishMarch 13, 2026 at 10:55 AM

    This is a very informative discussion about scalable system architecture. Developers who learn both Java programming and system design concepts can build more efficient and reliable applications. You can also explore Top System Design with Java Online Training in Hyderabad to understand real-world software architecture.

    ReplyDelete