如鹏java学习进程 将输入的正整数相加，ok结尾

import java.util.Scanner;


import com.rupeng.game.GameCore;


public class Main2 implements Runnable {


@Override
public void run() {


int sum = 0;


for (;;) {
String a = GameCore.input("number", "输入数字，程序将会把正整数求和，以ok结束");
if (a.equals("ok")) {
GameCore.alert(sum);
break;
} else {
int c = Integer.parseInt(a);


if (c < 0) {
continue;
} else {
sum = sum + c;
}
}
}
}


public static void main(String[] args) {
GameCore.start(new Main2());


}
}