java-字符输入流读取资料时的字符数组的使用

java-字符输入流读取文件时的字符数组的使用

public static void main(String[] args) throws Exception {
		FileReader fr = new FileReader("c:\\test.txt");// test.txt中内容1234567890
		char[] cs = new char[4];

		int count = 0;
		while ((count = fr.read(cs)) > 0) {

			for (int i = 0; i < count; i++) {
				System.out.println(cs[i]);
			}
		}
	}

Java实现文件复制

public void fileCopy(String filePath,String savePath){   
    try{   
           
        FileInputStream in = new FileInputStream(filePath);   
        FileOutputStream out = new FileOutputStream(savePath);   
        byte[] bt = new byte[1024];   
        int count;      
           while ((count = in.read(bt)) > 0) {      
               out.write(bt, 0, count);  //重点   
           }      
           in.close();      
           out.close();      
    }catch(IOException e){   
        e.printStackTrace();   
    }   
}