abstract class Number{
abstract void method();
}
class Perfectextends Number{
void method() {
System.out.println("2到1000的完數如下：");
inti, j, sum;
for (i = 2; i <= 1000;i++) {
sum = 0;
for (j = 1; j <= i/ 2; j++) {
if (i % j == 0)
sum = sum + j;
}
if (sum == i)
System.out.print(i + "");
}
System.out.println();
}
}
class Prime extendsNumber{
void method() {
System.out.println("2到100的素數如下：");
int i, j;
for (i = 2; i <= 100; i++) {
for (j = 2; j <= i / 2; j++) {
if (i % j == 0)
break;
}
if (j > i / 2)
System.out.print(i+ " ");
}
System.out.println();
}
}
public class Test {
public static void main(String[] args) {
Number n = new Perfect();
n.method();
n = new Prime();
n.method();
}
}
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標籤：Java相關