ExceptionDemo20.java

public class ExceptionDemo20 {
  public static void main (String[] args) throws Exception{
    a();
  }
  public static void a() throws Exception{
    try {
      c();
    } catch (Exception e) {
      b();
    }
  }
  public static void b() throws Exception {
    c();
  }
  public static void c() throws Exception {
    throw new Exception("test");
  }
}