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/**
* @version 1.00 11 Mar 1997
* @author Cay Horstmann
*/
import java.lang.reflect.Method;
import java.text.Format;
public class MethodPointerTest {
public static void main(String[] args) throws Exception {
printTable(1, 10, 10, MethodPointerTest.class.getMethod("square",
new Class[] { double.class }));
printTable(1, 10, 10, java.lang.Math.class.getMethod("sqrt",
new Class[] { double.class }));
}
public static double square(double x) {
return x * x;
}
public static void printTable(double from, double to, int n, Method f) {
System.out.println(f);
double dx = (to - from) / (n - 1);
for (double x = from; x <= to; x += dx) {
System.out.println( x);
try {
Object[] args = { new Double(x) };
Double d = (Double) f.invoke(null, args);
double y = d.doubleValue();
System.out.println( y);
} catch (Exception e) {
System.out.println("???");
}
}
}
}
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