1 package test1; 2 3 public class ExprEdit4 { 4 int value; 5 f()6 void f() { value = 3; } 7 ExprEdit4()8 public ExprEdit4() { value = 0; } 9 k1()10 public int k1() { 11 ExprEdit4 e = null; 12 e.f(); 13 e = null; 14 return new ExprEdit4() == null ? 1 : 0; 15 } 16 } 17