stem10.java

JAVA编程思想第四版英文原版习题答案. pdf原版的

// reusing/Stem10.java
// TIJ4 Chapter Reusing, Exercise 10, page 246
/* Modify the previous exercise so that each class only has non-default 
* constructors.
*/
 
import static org.greggordon.tools.Print.*;

class Component1 {
	Component1(byte b) { println("Component1(byte)"); }
}

class Component2 {
	Component2(short s) { println("Component2(short)"); }
}

class Component3 {
	Component3(int i) { println("Component3(int)"); }
}

class Root { 
	Component1 c1root;
	Component2 c2root;
	Component3 c3root;
	Root(float f) { 
		c1root = new Component1((byte)0);
		c2root = new Component2((short)0);
		c3root = new Component3(0);
		println("Root(foat)"); 
	} 
}

class Stem10 extends Root { 
	Component1 c1stem10;
	Component2 c2stem10;
	Component3 c3stem10;
	Stem10(double d) { 
		super(2.78f);
		c1stem10 = new Component1((byte)1);
		c2stem10 = new Component2((short)1);
		c3stem10 = new Component3(1);
		println("Stem10(double)"); 
	} 
	public static void main(String[] args) {
		Stem10 x = new Stem10(2.78);
	}
}