passobject.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 27 行

//: c03:PassObject.java
// Passing objects to methods may not be what
// you're used to.
import com.bruceeckel.simpletest.*;

class Letter {
  char c;
}

public class PassObject {
  static void f(Letter y) {
    y.c = 'z';
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("PassObject");
    Letter x = new Letter();
    x.c = 'a';
    System.out.println("1: x.c: " + x.c);
    f(x);
    System.out.println("2: x.c: " + x.c);
    monitor.expect(new String[] {
      "1: x.c: a",
      "2: x.c: z"
    });
  }
} ///:~