java，FileWrite简单写入

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

public class Test_4 {

    public static void main(String[] args) throws IOException{
        File file = new File("word.doc");
        FileWriter fw = new FileWriter(file);
        fw.write("三好学生");
        fw.close();

        FileReader fr =new FileReader(file);
        char[] b = new char[1024];
        int len=fr.read(b);
        System.out.println(new String(b,0,len));
        fr.close();
    }
}
///三好学生项目下的word.doc打开内容就是“三好学生”