fileinputdemo.java

JAVA学习源代码,大家可以好好参考,请多提宝贵意见

//FileInputDemo.java
import java.io.*;
public class FileInputDemo{
  public static void main(String args[]) {
    String fileName="InputFileExample.txt";
    File file=new File(fileName);
    FileInputStream inputStream;
    //创建一个文件对象
    byte[] bufferArray=new byte[10000000];
    long fileLength=file.length();
    System.out.println("\nLength of file " + fileName + " : " + fileLength);
    try {
      inputStream=new FileInputStream(file);
        try {
          //将文件中的内容读取到字节数组中
          inputStream.read(bufferArray, 0, bufferArray.length);
          System.out.println("\nFile "+fileName+" content:\n\n"
                               +new String(bufferArray,0,(int)fileLength));
          //关闭输入文件流
          inputStream.close();
        }
        // 捕获可能出现的输入/输出异常
        catch (IOException exception) {
          System.out.println("I/O Exception when reading or closing: "+exception.toString());
        }
      
    }
    catch(FileNotFoundException exception){
          System.out.println("File not find: "+exception.toString());
    }
  }
}