java文件io流输出

Question

package dadeo;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class filereader {
    public static void main(String[] args) {
//        String filepath = "d:\\hello.txt";
//        FileReader fileReader = null;
//        int key = 0;
//        try {
//            fileReader = new FileReader(filepath);
//            while(true){
//                try {
//                    if (((key=fileReader.read())!=-1)) {
//                        System.out.println((char)key);
//                    }
//                } catch (IOException e) {
//                    e.printStackTrace();
//                }
//
//            }
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        } finally {
//            if(fileReader!=null){
//            try {
//                fileReader.close();
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }}
    file file =new file();
        file.t1();
    }
}
class file{
    String filepath="hello.txt";
    FileWriter fileWriter=null;
    String name="刘秀";
    int data=0;
    public void t1(){
        try {
            fileWriter= new FileWriter(filepath);
            fileWriter.write(name.toCharArray());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                fileWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

Answer 1

public class CloneProject {
   public static void main(String[] args) throws IOException {
       File file=new File("hello.txt");
       file.createNewFile();
       FileWriter fileWriter=new FileWriter(file);
       fileWriter.write("刘秀");
       fileWriter.flush();
       fileWriter.close();
   }
}