记录自己的java面试题目(1)

这一段找工作,顺便把面试的题目记录下来。

一.读txt文件

import java.io.File;
import java.io.FileReader;
public class ReadTxt {
    public static void main(String[] args) {
        File f = new File("D:sql.txt");
        try {
            FileReader fr = new FileReader(f);
            char[] temp= new char[(int)f.length()];
            fr.read(temp);
            StringBuffer sb = new StringBuffer();
            for(int i=0;i<temp.length;i++){
                sb.append(temp[i]);
            }
            System.out.println(sb.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
public class ReadTxt1 {
    public static void main(String[] args) {
        try {
            FileInputStream fis = new FileInputStream("D:sql.txt");
            BufferedReader br = new BufferedReader(new InputStreamReader(fis));
            String s;
            StringBuffer sb = new StringBuffer();
            while((s = br.readLine())!=null){
                sb.append(s + " n");
            }
            System.out.println(sb.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

补充：Jsp教程,Java技巧及代码