Java基础之BufferedReader

秒速五厘米 2022-12-13 01:24 128阅读 0赞

package cn.itcast.p2.io.charstream.buffer;
    
    import java.io.BufferedReader;
    import java.io.FileNotFoundException;
    import java.io.FileReader;
    import java.io.IOException;
    
    public class BufferedReaderDemo {
        
    
    	/**
    	 * @param args
    	 * @throws IOException 
    	 */
    	public static void main(String[] args) throws IOException {
        
    
    		FileReader fr = new FileReader("buf.txt");
    		
    		BufferedReader bufr = new BufferedReader(fr);
    		
    		String line = null;
    		
    		while((line=bufr.readLine())!=null){
        
    			System.out.println(line);
    		}
    		/*
    		String line1 = bufr.readLine();
    		System.out.println(line1);
    		String line2 = bufr.readLine();
    		System.out.println(line2);
    		String line3 = bufr.readLine();
    		System.out.println(line3);
    		String line4 = bufr.readLine();
    		System.out.println(line4);
    		String line5 = bufr.readLine();
    		System.out.println(line5);
    		*/
    		
    		
    		bufr.close();
    		
    		
    	}
    
    	/**
    	 * @throws FileNotFoundException
    	 * @throws IOException
    	 */
    	public static void demo() throws FileNotFoundException, IOException {
        
    		FileReader fr = new FileReader("buf.txt");
    		
    		char[] buf = new char[1024];
    		
    		int len = 0;
    		while((len=fr.read(buf))!=-1){
        
    			System.out.println(new String(buf,0,len));
    		}
    		
    		fr.close();
    	}
    
    }

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