Mega Code Archive
Testing class Class
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// : c10:ToyTest.java
// Testing class Class.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
interface HasBatteries {
}
interface Waterproof {
}
interface Shoots {
}
class Toy {
// Comment out the following default constructor
// to see NoSuchMethodError from (*1*)
Toy() {
}
Toy(int i) {
}
}
class FancyToy extends Toy implements HasBatteries, Waterproof, Shoots {
FancyToy() {
super(1);
}
}
public class ToyTest {
static void printInfo(Class cc) {
System.out.println("Class name: " + cc.getName() + " is interface? ["
+ cc.isInterface() + "]");
}
public static void main(String[] args) {
Class c = null;
try {
c = Class.forName("FancyToy");
} catch (ClassNotFoundException e) {
System.out.println("Can't find FancyToy");
System.exit(1);
}
printInfo(c);
Class[] faces = c.getInterfaces();
for (int i = 0; i < faces.length; i++)
printInfo(faces[i]);
Class cy = c.getSuperclass();
Object o = null;
try {
// Requires default constructor:
o = cy.newInstance(); // (*1*)
} catch (InstantiationException e) {
System.out.println("Cannot instantiate");
System.exit(1);
} catch (IllegalAccessException e) {
System.out.println("Cannot access");
System.exit(1);
}
printInfo(o.getClass());
}
} ///:~
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