我们可以通过创建一个StringBuffer或StringBuilder对象来逐个读取Reader中的字符,并将其拼接成一个完整的字符串。下面是一个示例代码: importjava.io.*;publicclassReaderToString{publicstaticStringreaderToString(Readerreader)throwsIOException{StringBufferstringBuffer=newStringBuffer();intdata;while((data=reader.read())...
importjava.io.StringReader;publicclassMain{publicstaticvoidmain(String[]args)throwsException{Stringtext="Hello, World!";StringReaderstringReader=newStringReader(text);Stringresult=ReaderToStringConverter.convertToString(stringReader);System.out.println(result);}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ...
Just like there are many ways for writing String to text file, there are multiple ways to read String form File in Java. You can use FileReader, BufferedReader, Scanner, and FileInputStream to read text from file. One thing to keep in mind is character encoding. You must use correct ...
reader.close(); 复制代码 完整的示例代码如下: import java.io.StringReader; public class Main { public static void main(String[] args) { String input = "Hello World"; StringReader reader = new StringReader(input); try { int data = reader.read(); while (data != -1) { char c = (char...
String url="jdbc:xxxx://xxxx:xxxx/xxxx";Connection conn=DriverManager.getConnection(url,username,password);... 这里并没有涉及到spi的使用,接着看下面的解析。 源码实现 上面的使用方法,就是我们普通的连接数据库的代码,并没有涉及到SPI的东西,但是有一点我们可以确定的是,我们没有写有关具体驱动的硬编码Cl...
@TestvoidtestHttpURLConnection()throws Exception{varurl=newURL("https://taoofcoding.tech");varcon=(HttpURLConnection)url.openConnection();con.setRequestMethod("GET");varin=newBufferedReader(newInputStreamReader(con.getInputStream()));String inputLine;StringBuffer content=newStringBuffer();while((...
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2、InputStream–>String inputStream input =null; StringBuffer out=newStringBuffer();byte[] b =newbyte[4096];for(intn; (n = input.read(b)) != -1;) { out.append(newString(b, 0, n)); }returnout.toString(); 3、Reader –>String ...
writer2.close();Readerreader=newFileReader(file);intdata=reader.read();while(data != -1) {// 将会输出 string from writer1, append content from writer2System.out.print((char) data); data = reader.read(); } reader.close(); }
所以 Java 中有字节流和字符流,以及在字符流和字节流之间进行转换的转换流,如 InputStreamReader和OutputStreamReader,这两个类是字节流和字符流之间的适配器类,承担了编码转换的任务。 10、抽象的(abstract)方法是否可同时是静态的(static), 是否可同时是本地方法(native),是否可同时被 synchronized?