InputStream is = new FileInputStream(“a.txt”); 等同于 InputStream is = new FileInputStream(new File(“a.txt”)); OutputStream类似与之类似, package com.Ckinghan.outputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java...
public static void main(String[] args) { InputStream is = null; try { File file = new File("F:\\code\\java\\123.txt"); is = new FileInputStream(file); //获取文件内容长度 long length = file.length(); byte[] fileContent = new byte[(int)length]; is.read(fileContent); String ...
1.FileInputStream(File file) 2.FileInputStream(String path) 读取字节方法1:一个个字节读取 public static void main(String[] args) { try { //创建一个字节输入流对象 InputStream is=new FileInputStream("L:\\io.txt"); int b=-1; while((b=is.read())!=-1)//字节读取,当为-1时读取完毕...
See Also: SecurityManager.checkRead(java.lang.String) FileInputStream public FileInputStream(File file) throws FileNotFoundException Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system. A new FileDescriptor object is crea...
}publicstaticvoidfileInputStreamUtf8()throwsIOException {//字节流读取文件不会有中文乱码的问题,但文件的编码一定要是UTF-8,不然在输出时就要指定相应的编码InputStream is =newFileInputStream("c:/img/utf8.txt");//utf8.txt为UTF-8编码OutputStream os =newFileOutputStream("c:/img/utf8-2.txt");/...
(读写文件)下列代码实现了将一个文件的内容复制到另一个文件的功能。下划线处应填入的代码是___。 import java .io .* ; public class Test{ public static void main ( String [ ] args ) { try{ FileInputStream is = n
利用FileInputStream进行文件复制 public class FileInputStreamCopy { public static void main(String[] args) throws IOException { //1. 创建字节输入流对象,用来读取 FileInputStream fis = new FileInputStream("E:\\test.txt"); //2创建字节输出流对象,用来写入//没有会创建 ...
InputStream is = new FileInputStream(file)is就可以从该file里读取数据了，int length = 0;byte[] b = new byte[200];while(-1 != ( length = is.read(b[200]) ){ System.out.print(new String(b, 0, length));} is.close();这是标准的从file里以字节流读取的模板 建议自己去...
(1) 在C盘根目录下建立一个名称为“FileInputStreamDemo.txt”的文件,文件内输入“This is atest about FileInputStream .”; (2) 创建Java文件读取文件,代码如下: 代码语言:javascript 复制 importjava.io.File;importjava.io.FileInputStream;publicclassFileInputStreamDemo{publicstaticvoidmain(String[]args){...
3、使用Contains方法，检测字符串str中是否含有he，Contains方法查找到指定内容就返回true，否则返回false。4、使用Contains方法，检测字符串str中是否含有He。5、在调试模式下运行，可以看到结果是“存在”，这就表示Contains方法判断存在是区分大小写的。注意事项：字符串或串(String)是由数字、字母、下划线...