swing - Java access frame -

im trying following code using java.swing , java.awt

init.java

package es.com.gui;  import java.awt.*;  import javax.swing.*;  public class init extends jframe {     public init()     {                // start actual gui          settitle("basic calculator");         setsize(300, 300);         setlocationrelativeto(null);         setlayout(new flowlayout());         setdefaultcloseoperation(exit_on_close);          // add gui elements          constructor constructor = new constructor();          jtextfield input1 = constructor.addtextfield("e");          input1.setcolumns(25);      } } 

constructor.java

package es.com.gui;  import javax.swing.*; import java.awt.*;  public class constructor extends jframe {     public jlabel addlabel(string text)     {          jlabel label = new jlabel(text);          add(label);           return label;     }      public jbutton addbutton(string text)     {         jbutton button = new jbutton(text);         add(button);          return button;     }      public jtextfield addtextfield(string text)     {         jtextfield textarea = new jtextfield(text);         add(textarea);          return textarea;     } } 

the thing want have functions construct new gui elements on class , heres problem if add functions init.java works fine adding them constructor.java seems not work (no error @ all, elements never appear)

your question specific example of general question,

how can call methods of 1 object within object.

and 1 possible solution pass references. example change constructor's constructor accept init object , use initialize init field, init:

public class constructor {   private init init;    public constructor(init init) {     this.init = init;   }    // can use init init instance throughout class 

and pass this in when calling constructor.

as aside: please read , follow java naming conventions including giving classes names start upper case letters (see code above example).