1 package test1; 2 3 public abstract class EmptyBody { EmptyBody()4 public EmptyBody() {} EmptyBody(int i)5 public EmptyBody(int i) {} EmptyBody(String i)6 public EmptyBody(String i) { System.out.println(i); } EmptyBody(double d)7 public EmptyBody(double d) { this(3); } 8 m1(int i, int j)9 public void m1(int i, int j) {} m2(int i, int j)10 public void m2(int i, int j) { 11 try { return; } 12 catch (Exception e) {} 13 } 14 m3(int k)15 public int m3(int k) { return 0; } 16 m4()17 public native int m4(); 18 m5()19 public abstract int m5(); 20 } 21