mugs.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 48 行

//: initialization/Mugs.java
// Java "Instance Initialization."
import static net.mindview.util.Print.*;

class Mug {
  Mug(int marker) {
    print("Mug(" + marker + ")");
  }
  void f(int marker) {
    print("f(" + marker + ")");
  }
}

public class Mugs {
  Mug mug1;
  Mug mug2;
  {
    mug1 = new Mug(1);
    mug2 = new Mug(2);
    print("mug1 & mug2 initialized");
  }
  Mugs() {
    print("Mugs()");
  }
  Mugs(int i) {
    print("Mugs(int)");
  }
  public static void main(String[] args) {
    print("Inside main()");
    new Mugs();
    print("new Mugs() completed");
    new Mugs(1);
    print("new Mugs(1) completed");
  }
} /* Output:
Inside main()
Mug(1)
Mug(2)
mug1 & mug2 initialized
Mugs()
new Mugs() completed
Mug(1)
Mug(2)
mug1 & mug2 initialized
Mugs(int)
new Mugs(1) completed
*///:~