io中的字节转成字符的4个简单应用

Bertha 。 2022-08-10 13:45 105阅读 0赞

io中的字节转成字符的4个简单应用

package com.njtcstudent.javademo;
    
    import java.io.BufferedReader;
    import java.io.BufferedWriter;
    import java.io.FileReader;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.OutputStreamWriter;
    
    public class truef {
    
    	public static void main(String[] args) throws IOException {
    //		copytextfileone();// 复制一个文本文件,即io.txt复制到io2.txt 中
    //		readkeyboard();// 从键盘输入文字，并把它输出到电脑中的一个文体文件中
    //		printtxtinfo();//把一个文本文件的内容显示在控制台上
    		readkeyboardprint();//从键盘输入文字，在你控制台输出它的大写字母
    
    	}
    
    	public static void readkeyboardprint() throws IOException {
    			BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
    			BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));
    			String ff;
    			while((ff=bufr.readLine())!=null){
    				if(!(ff.equals("over"))){
    					bufw.write(ff.toUpperCase()+"\n");
    					bufw.flush();
    					
    				}
    				else
    					break;
    			}
    			bufr.close();
    			bufw.close();
    			
    			
    	}
    
    	public static void printtxtinfo() throws IOException {
    		BufferedReader bufr = new BufferedReader(new FileReader("io.txt"));
    		BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));
    		String ff;
    		
    		while((ff=bufr.readLine())!=null){
    			bufw.write(ff+"\n");
    			bufw.flush();
    		}
    		
    	}
    
    	public static void readkeyboard() throws IOException {
    //		InputStreamReader isr = new InputStreamReader((System.in));
    //		FileWriter fw = new FileWriter("whatyouenter.txt");
    		BufferedReader bufr = new BufferedReader( new InputStreamReader(System.in));
    		BufferedWriter bufw = new BufferedWriter ( new FileWriter("whatyouenter.txt"));
    		
    		String line;
    		while((line=bufr.readLine())!=null){
    			if(!line.equals("over"))
    			{
    			
    				bufw.write(line);
    				bufw.newLine();
    				bufw.flush();				
    			}
    			else
    				break;
    		}
    		bufw.close();
    		bufw.close();
    	}
    
    	public static void copytextfileone() throws IOException {
    		// FileReader fr = new FileReader("io.txt");
    		// FileWriter fw = new FileWriter("io2.txt");
    
    		BufferedReader bufr = new BufferedReader(new FileReader("io.txt"));
    		BufferedWriter buwr = new BufferedWriter(new FileWriter("io2.txt"));
    		String rr;
    		while ((rr = bufr.readLine()) != null) {
    			buwr.write(rr);
    			buwr.newLine();
    			buwr.flush();
    		}
    		buwr.close();
    		bufr.close();
    
    	}
    
    }