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jAvA txt

调用时,类名.readFile("d:/1.txt");即可: public static String[] readFile(String sourceFileName) throws IOException { String[] array = null; Set result = new HashSet(); String lineText; BufferedReader reader = null; try { File s...

用PrintWriter类: import java.io.File; import java.io.PrintWriter; public class Main { public static void main(String args[]) throws Exception { File fp=new File("c:\\a.txt"); String str="ABCDE"; PrintWriter pfp= new PrintWriter...

用java读取txt文件: public String read(String path) throws Exception { //读 File f = new File(path); FileInputStream input = new FileInputStream(f); BufferedInputStream buf=new BufferedInputStream(input); byte[] b=new byte[(int...

向txt文件写入内容基本思路就是获得一个file对象,新建一个txt文件,打开I/O操作流,使用写入方法进行读写内容,示例如下: package common;import java.io.*;import java.util.ArrayList;public class IOTest {public static void main (Strin...

public class update_txt { public static void main(String[] args) { File file = new File("D:\\update_txt.txt"); try { if(file.isFile()!=true) { file.createNewFile(); } //读入数据 BufferedReader buff = new BufferedReader(new File...

用StringTokenizer: StringTokenizer是java中object类的一个子类,继承自 Enumeration接口。此类允许一个应用程序进入一个令牌(tokens),而且StringTokenizer类用起来StreamTokenizer 类更加简单。StringTokenizer不会区分对象、函数、数组、...

String filename = "a.txt"; RandomAccessFile rf = new RandomAccessFile(filename, "rw"); FileChannel fc = rf.getChannel(); //将文件大小截为0 fc.truncate(0);

java查找一个txt文件下的内容,先在c盘创建一个txt格式文件,如图: 实例代码如下: package com.qiu.lin.he;import java.io.BufferedReader;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java....

import java.io.File;import java.io.PrintStream;import java.util.Scanner;/** * 2015年11月18日上午9:31:05 * * @author cs2110 TODO 合并数组 * */public class MergeFile { private String afile = "D:/1.txt"; private String bfile = "D:...

import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintStream; public class TestBaiduKnow { public static void main(String[] args) throws IOException { FileOutputStream fs = new Fi...

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