java 使用java读取换行符
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reading new line char using java
提问by Tokuchi Toua
Help guys, i've just seen this example in the web. i would like to use this to print exactly the contents of a text file in the same format containing new lines, but it just prints out the first line. thanks
帮帮忙，我刚刚在网上看到了这个例子。我想用它以包含新行的相同格式准确打印文本文件的内容，但它只是打印出第一行。谢谢
import java.util.*;
import java.io.*;
public class Program
{
public static void main(String[] args)throws Exception
{
Scanner scanner = new Scanner(new FileReader("B:\input.txt"));
String str = scanner.nextLine();
// Convert the above string to a char array.
char[] arr = str.toCharArray();
// Display the contents of the char array.
System.out.println(arr);
}
}
回答by Kumar Vivek Mitra
Try this.. To read the whole file as it is.....
试试这个.. 按原样读取整个文件.....
File f = new File("B:\input.txt");
FileReader fr = new FileReader(f);
BufferedReader br = new BufferedReader(fr);
String s = null;
while ((s = br.readLine()) != null) {
// Do whatever u want to do with the content of the file,eg print it on console using SysOut...etc
}
br.close();
But still if you want to use Scanner then try this....
但是如果你想使用扫描仪，那么试试这个......
while ( scan.hasNextLine() ) {
str = scan.nextLine();
char[] arr = str.toCharArray();
}
回答by NiziL
public class Program {
public static void main(String[] args) throws Exception {
Scanner scanner = new Scanner(new FileReader("B:\input.txt"));
String str;
while ((str = scanner.nextLine()) != null)
// No need to convert to char array before printing
System.out.println(str);
}
}
The nextLine() method provides only one line, you must call it until have a null ( ~ C's EOF )
nextLine() 方法只提供一行，你必须调用它直到有一个空值（~C 的 EOF）
