readLine()和newLine()方法
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BufferedReader的readLine()方法可以读取一行字符(不包含换行符号)
读取一个文本行,通过下列字符之一即可认为某行已终止:换行(\n)、回车(\r)或回车后直接跟着换行。 返回: 包含该行内容的字符串,不包含任何行终止符,如果已到达流末尾,则返回null
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BufferedWriter的newLine()可以输出一个跨平台的换行符号"\r\n"
BufferedReader br = new BufferedReader(new FileReader("aaa.txt")); BufferedWriter bw = new BufferedWriter(new FileWriter("bbb.txt")); String line; while((line = br.readLine()) != null) { bw.write(line); //bw.write("\r\n"); //只支持windows系统 bw.newLine(); //跨平台的 } br.close(); bw.close();
package com.heima.chario;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Demo04_Buffered {
/**
* @param args
* 带缓冲区的流中的特殊方法
* readLine()
* newLine();
*
* newLine()与\r\n的区别
* newLine()是跨平台的方法
* \r\n只支持的是windows系统
* @throws IOException
*/
public static void main(String[] args) throws IOException {
//demo1();
BufferedReader br = new BufferedReader(new FileReader("zzz.txt"));
BufferedWriter bw = new BufferedWriter(new FileWriter("aaa.txt"));
String line;
while((line = br.readLine()) != null) {
bw.write(line);
//bw.newLine(); //写出回车换行符
//bw.write("\r\n");
}
br.close();
bw.close();
}
public static void demo1() throws FileNotFoundException, IOException {
BufferedReader br = new BufferedReader(new FileReader("zzz.txt"));
String line;
while((line = br.readLine()) != null) {
System.out.println(line);
}
br.close();
}
}