swing - How do I pass a value JFrame to JFrame by click of a button in Java? -

i need pass value jframe jframe click of button. i'm new programming. tried everything. don't know how accomplish this.

here code -

import javax.swing.jframe; import javax.swing.jbutton; import javax.swing.jtextfield; import javax.swing.jlabel; import java.awt.flowlayout;  public class demo{      private final jlabel showinput;      private final jtextfield inputfield;       public demo(){           jframe inputframe = new jframe("input");           jframe outputframe = new jframe("output");            inputfield = new jtextfield(15);           jbutton button = new jbutton("click here");                 }           });            showinput = new jlabel("type in box , press button");            inputframe.getcontentpane().setlayout(new flowlayout());           inputframe.getcontentpane().add(inputfield);           inputframe.getcontentpane().add(button);           inputframe.pack();           inputframe.setdefaultcloseoperation(jframe.exit_on_close);            outputframe.getcontentpane().setlayout(new flowlayout());           outputframe.getcontentpane().add(showinput);           outputframe.pack();           outputframe.setdefaultcloseoperation(jframe.exit_on_close);            inputframe.setvisible(true);           outputframe.setvisible(true);      }       public static void main(string[] args){           demo example = new demo();      } } 

try one.

import javax.swing.jframe; import javax.swing.jbutton; import javax.swing.jtextfield; import javax.swing.jlabel; import java.awt.flowlayout; import java.awt.event.actionlistener; import java.awt.event.actionevent;  public class demo{      private final jlabel showinput;      private final jtextfield inputfield;       public demo(){           jframe inputframe = new jframe("input");           jframe outputframe = new jframe("output");            inputfield = new jtextfield(15);           jbutton button = new jbutton("click here");           button.addactionlistener(new actionlistener(){                public void actionperformed(actionevent e){                     string textfieldtext = inputfield.gettext();                     showinput.settext(textfieldtext);                }           });            showinput = new jlabel("type in box , press button");            inputframe.getcontentpane().setlayout(new flowlayout());           inputframe.getcontentpane().add(inputfield);           inputframe.getcontentpane().add(button);           inputframe.pack();           inputframe.setdefaultcloseoperation(jframe.exit_on_close);            outputframe.getcontentpane().setlayout(new flowlayout());           outputframe.getcontentpane().add(showinput);           outputframe.pack();           outputframe.setdefaultcloseoperation(jframe.exit_on_close);            inputframe.setvisible(true);           outputframe.setvisible(true);      }       public static void main(string[] args){           demo example = new demo();      } } 

i add these code function need.

/*  button.addactionlistener(new actionlistener(){      // when button clicked, actionperformed called      public void actionperformed(actionevent e){           string textfieldtext = inputfield.gettext(); // text           showinput.settext(textfieldtext); // set text on jlabel      } });  */