public class Class1 {
    String str = new String;
    public String str2;
    public void method1(){
        str2 = "qwerty";
    }
}
//=========================================================


public class Class2 implements ActionListener{
//-----
    Class1 parent;
    Run (Class1 parent){
        this.parent = parent;
    }
//-----
    public void actionPerformed(ActionEvent e){
       System.out.println(parent.str2);
    }