java读取远程文件

package read;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
public class Test extends Thread {
String str = "";
public void run() {
while (true) {
File file = new File("//192.168.1.110/hhh/abc.txt");
int size = (int) file.length();
try {
FileReader readIn = new FileReader(file);
BufferedReader br = new BufferedReader(readIn);
String strtemp = null;
while ((strtemp = br.readLine()) != null) {
str = str + strtemp;
//System.out.println(str);
}
br.close();
readIn.close();
this.sleep(5000);
} catch (Exception e) {
e.printStackTrace();
}
if (new File("//192.168.1.110/hhh/abc.txt").length() != size) {
System.out.println(str);
} else {
System.out.println("-------------File no change-------------");
}
}
}
}