我一直在努力使这个循环
for ( int i = 0; i < Main.ipList.length; i++){
JButton btn = new JButton();
btn.setText(Main.ipList[i]);
panel.add(btn);
btn.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
Main.refreshSpecificIp(i);
System.out.println("Bu");
}
});
}
Main.refreshSpecificIp(i)
给我一个错误,说“ i”必须是最终的或有效地是最终的。这是refreshSpecificIp函数: public static void refreshSpecificIp(Integer d){
try
{
InetAddress inet = InetAddress.getByName(ipList[d]);
System.out.println("Sending Ping Request to " + ipList[d]);
boolean status = inet.isReachable(500000); //Timeout = 5000 milli seconds
if (status)
{
System.out.println("Status : " + ipList[d]+ " Host is reachable");
}
else
{
System.out.println("Status " + ipList[d]+ " Host is not reachable");
}
}
catch (UnknownHostException e)
{
System.err.println(ipList[d] + " Host does not exists");
}
catch (IOException e)
{
System.err.println(ipList[d] + " Error in reaching the Host");
}
}
static String[] ipList = {"127.0.0.1", "173.57.51.111", "69.696.69.69"};
如果可以的话请帮助我,以便我继续进行我的项目。
谢谢。
最佳答案
您可以定义另一个局部变量,将其声明为final,然后将i
的值分配给它:
for ( int i = 0; i < Main.ipList.length; i++){
JButton btn = new JButton();
btn.setText(Main.ipList[i]);
panel.add(btn);
final int j = i;
btn.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
Main.refreshSpecificIp(j);
System.out.println("Bu");
}
});
}