阅读下段代码import java.io.*;public class Example{public static void main(String[] args) throws Exception { FileInputStream fis = new FileInputStream("file.txt");FileOutputStream fos = new FileOutputStream("copy_file.txt");int ch = 0;while((ch =fis.read())!=-1){fos.write(ch);}fos._______;fis.close(); }}下列选项中,哪个填写在程序的空白处,程序不会报错。
A. read()
B. available()
C. close()
D. write()
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阅读下列代码import java.io.*;public class Example{ public static void main(String[] args) throws Exception {// 创建一个带缓冲区的输入流BufferedInputStream bis = new BufferedInputStream(new ________("src.txt"));// 创建一个带缓冲区的输出流BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("des.txt"));int len;while ((len = bis.read()) != -1) {bos.write(len);}bis.close();bos.close(); }}下列选项中,可以填写在程序空白处的是()
A. FileInputStream
B. File
C. InputStream
D. 以上答案都不正确
阅读下段代码import java.io.*;public class Example { public static void main(String[] args) throws Exception {byte[] bufs = new byte[] { 97, 98, 99, 100 };// 创建一个字节数组ByteArrayInputStream bis = new ByteArrayInputStream(bufs);//读取字节数组中的数据//下面的代码是循环读取缓冲区中的数据 int b;while ((b = bis.read()) != -1) {System.out.print((char) b+",");} }}下列选项中,哪一个是程序的运行结果( )
A. 97,98,99,100,
B. 100,99,98,97,
C. a,b,c,d,
D. A,B,C,D,
阅读下列代码import java.io.*;public class Example{public static void main(String[] args) throws Exception {OutputStream out = new FileOutputStream("itcast.txt ", true);String str = "欢迎你!";byte[] b = str.getBytes();for (int i = 0; i < b.length; i++) {out.______(b[i]);}out.close(); }}下列选项中,哪个填写在程序空白处会使程序正确。
A. read()
B. write()
C. close()
D. available()
阅读下列代码import java.io.*;public class Example{public static void main(String[] args) throws Exception { File file = new File("itcast.txt"); FileInputStream in = new FileInputStream(file); // 以下是用缓冲区读写文件byte[] buff = new byte[1024]; // 定义一个字节数组,作为缓冲区int len; while ((len = in.______) != -1) { // 判断是否读到文件末尾System.out.println(new String(buff,0,len));}in.close(); }}下列选项中,哪个填写在空白处,程序不会报错。
A. read(buff)
B. read()
C. write(buff)
D. write()