IO(二、异常处理）

import java.io.FileWriter;

 import java.io.IOException;



 public class IODemo2 {

     public static void main(String[] args) {

FileWriter fw=null;

try {

fw = new FileWriter("G:\\io.txt");

fw.write("adasds");


} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println(e.toString());

}
finally{

try {


if(fw!=null){ //防止未创建成功抛空指针异常
fw.close();
}


} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println(e.toString());

}

}


}



 }