Thread: where located my mistake

import javax.swing.*;
class biodata {
  public static void main(String[]args)	{
  	JOptionPane.showInputDialog (null,"hello");
  	String nama = JOptionpane.showInputDialog (null,"masukkan nama:");
  	String nim = JOptionpane.showInputDialog (null,"masukkan nim:");
  	String kelas = JOptionpane.showInputDialog (null,"kelas:");
  	JOptionPane.ShowMassageDialog(null, "nnama anda adalah "+nama+"\nnim anda adalah"+nim+"\nkelas anda adalah "+kelas);
 
  }
}

Hello erdy_rezki!
You should be more specific with the problems you have with the above code. But I can see some syntax errors (spelling mistakes).
Remember that Java is case sensitive - i.e. JOptionPane != JOptionpane
and also showMessageDialog != ShowMassageDialog
If you be careful with your spelling the code will compile without any errors.