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import java.io.*;
public class Echo {
public static void main(String[] args) {
Echo e = new Echo();
e.printClassesFiled(javax.swing.JButton.class);
}
public void printClassesFiled(Class clazz) {
System.out.println(clazz.getName());
Class superClazz = clazz.getSuperclass();
System.out.println(superClazz.getName());
boolean a = !"java.lang.Object".equals(superClazz.getName());
boolean b = (superClazz != null);
System.out.println(a + " " + b);
while (b && a) {
System.out.println("hehe2");
printClassesFiled(superClazz);
}
}
}