alias2.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 26 行

//: appendixa:Alias2.java
// Method calls implicitly alias their
// arguments.
import com.bruceeckel.simpletest.*;

public class Alias2 {
  int i;
  Alias2(int ii) { i = ii; }
  static void f(Alias2 reference) {
    reference.i++;
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("Alias2");
    Alias2 x = new Alias2(7);
    System.out.println("x: " + x.i);
    System.out.println("Calling f(x)");
    f(x);
    System.out.println("x: " + x.i);
    monitor.expect(new String[] {
      "x: 7",
      "Calling f(x)",
      "x: 8"
    });
  }
} ///:~