Someone

// Main Classpublic class Main extends javax.swing.JFrame {        /** Creates new form Main */    public Main() {        initComponents();    }    public static void main(String args[]) {        java.awt.EventQueue.invokeLater(new Runnable() {            public void run() {                                Main myframe =  new Main();                myframe.setVisible(true);                                Foo changeit = new Foo();                changeit.ChangeMainLabel("bla");                            }        });    }            }//Foo Classpublic class Foo {        /** Creates a new instance of Foo */    public Foo() {    }        public void ChangeMainLabel(String somestring) {        // myframe.jLabel1.setText("Ole!")    }