在我的程序中,當我在下面的一段代碼中調用updateNextPortNum方法時,爲什麼這裏有一個錯誤,說:「此行多個標記 - 路由器無法解析 - newRouterIp無法解析爲變量」接口錯誤
else if (operType.equals("3")){
System.out.println("Inpur router number: ");
String routerNum = br.readLine();
error ==> rm.updateNextPortNum(routerNum, newRouterIp, newPortNum);
}
類RouterManage被調用的函數:
class RouterManage {
private ArrayList al = null;
public RouterManage() {
al = new ArrayList();
}
// add Router
public void addRouter(Router router) {
al.add(router);
}
// show information of Router
public void showInfo(String routerNum) {
for (int i = 0; i < al.size(); i++) {
// take Router object out
Router router = (Router) al.get(i);
if (router.getRouterNum().equals(routerNum)) {
System.out.println("Find this router, info of its: ");
System.out.println("Router num: " + routerNum);
System.out.println("Router IP: " + router.getRouterIp());
System.out.println("Next Router PortNum: " + router.getNextPortNum());
}
}
}
// show information of Router
public void showAllInfo(String routerNum, String routerIp, int nextPortNum) {
for (int i = 0; i < al.size(); i++) {
Router router = (Router) al.get(i);
System.out.println("All router information: ");
System.out.println("Router num: " + routerNum);
System.out.println("Router IP: " + router.getRouterIp());
System.out.println("Next Router PortNum: " + router.getNextPortNum());
}
}
// change next port num
public void updateNextPortNum(String routerNum, String newRouterIp, int newPortNum) {
for (int i = 0; i < al.size(); i++) {
Router router = (Router) al.get(i);
if (router.getRouterNum().equals(routerNum)) {
// change router's ip
router.setRouterIp(newRouterIp);
// change router port number
router.setNextPortNum(newPortNum);
}
}
}
}
我只是嘗試寫一個簡單的接口來實現的選擇功能。
謝謝,夥計們。
因爲'router'和'newRouterIp'不在範圍內那裏。這些變量在哪裏/如何申報? – azurefrog 2014-12-11 05:13:07
也許你的路由器和newRouterIp不存在。嘗試首先聲明它。 '你的範圍內的字符串路由器;&'字符串newRouterIp;'。或將您的代碼發佈到您聲明的位置。 – Secondo 2014-12-11 05:19:07
@azurefrog我注意到,更新上面的程序,問題仍然沒有解決。 – 2014-12-11 05:20:26