Demonstration file input and output stream basic usage

package IODemo;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class FileInputStream {
    
    
	private static final String FilePath="src/IODemo/FileDemo133.java";
	public static void main(String[] args) throws IOException {
    
    
		writeFile();
		Readfile();
	}
	
	public static void writeFile() throws IOException {
    
    
		final String FilePath1="src/IODemo/FileDemo133.java";
		OutputStream outStream=new FileOutputStream(FilePath1,true);//第二个参数如果是true则会追加写，如果是false则会覆盖写
		String content="nishaofadfafefa";//写入内容
		content +="adsfafdsfaferefaoajsdofij";//写入内容
		outStream.write(content.getBytes());
		outStream.close();
	}
	public static void Readfile() throws IOException {
    
    
		File file =new File(FilePath);
		InputStream  inputStream =new java.io.FileInputStream(file);
		//读取文件的基本操作-相对固定
		byte[] bytes=new byte[2000];//inputStream.available()获取输入流可以读取的文件大小（单位是字节）
		inputStream.read(bytes);
//		int count=0;
//		while((bytes[count]=(byte)inputStream.read()) !=-1) {
    
    
//			count++;
//		}
		String content =new String(bytes);//将读取的字节数组转换成字符串
		System.out.println(content);
		inputStream.close();
	}

}