multiplereturns.java

thinking in java 书中源码 第四版

//: exceptions/MultipleReturns.java
import static net.mindview.util.Print.*;

public class MultipleReturns {
  public static void f(int i) {
    print("Initialization that requires cleanup");
    try {
      print("Point 1");
      if(i == 1) return;
      print("Point 2");
      if(i == 2) return;
      print("Point 3");
      if(i == 3) return;
      print("End");
      return;
    } finally {
      print("Performing cleanup");
    }
  }
  public static void main(String[] args) {
    for(int i = 1; i <= 4; i++)
      f(i);
  }
} /* Output:
Initialization that requires cleanup
Point 1
Performing cleanup
Initialization that requires cleanup
Point 1
Point 2
Performing cleanup
Initialization that requires cleanup
Point 1
Point 2
Point 3
Performing cleanup
Initialization that requires cleanup
Point 1
Point 2
Point 3
End
Performing cleanup
*///:~