小错误，帮忙

[立志做一个佳娃~]

import javax.swing.JOptionPane;
import java.util.*;
public class ghyghost {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int curr_hour=Calendar.getInstance().get(Calendar.HOUR_OF_DAY);
JOptionPane.showMessageDialog(null,curr_hour);
}
}


类型不匹配，怎么改？

[立志做一个佳娃~]

ding

[believefym]

JOptionPane.showMessageDialog(null,""+curr_hour);