ObjectInputStream类readUTF()方法
- readUTF() 方法可在
java.io
包。 - readUTF() 方法用于以更新的编码方案 UTF-8 格式读取字符串。
- readUTF() 方法是一个非静态方法,它只能通过类对象访问,如果我们尝试使用类名访问方法,那么我们将得到一个错误。
-
readUTF() 方法可能会在读取字符串时抛出异常。
- IOException:在执行时遇到任何输入/输出错误时可能会抛出此异常。
- UTFDataFormatException:当读取的字节表示字符串的 UTF-8 编码无效时,可能会抛出此异常。
用法:
public String readUTF();
参数:
- 它不接受任何参数。
返回值:
该方法的返回类型是String
,它返回 Unicode 字符串。
例:
// Java program to demonstrate the example
// of String readUTF() method of
// ObjectInputStream
import java.io.*;
public class ReadUTFOfOIS {
public static void main(String[] args) throws Exception {
// Instantiates ObjectOutputStream , ObjectInputStream
// FileInputStream and FileOutputStream
FileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");
ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);
FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");
ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);
// By using writeUTF() method is to write
// the encoded string in UTF-8 to the
// obj_out_stm stream
obj_out_stm.writeUTF("JAVA");
obj_out_stm.writeUTF("C");
obj_out_stm.writeUTF("C++");
obj_out_stm.writeUTF("SFDC");
obj_out_stm.flush();
while (obj_in_stm.available() > 0) {
// By using readUTF() method is to read
// encoded string from the obj_in_stm
String val = (String) obj_in_stm.readUTF();
System.out.println("obj_in_stm.readUTF():" + val);
}
// By using close() method is to
// close all the streams
file_in_stm.close();
file_out_stm.close();
obj_in_stm.close();
obj_out_stm.close();
}
}
输出
obj_in_stm.readUTF():JAVA obj_in_stm.readUTF():C obj_in_stm.readUTF():C++ obj_in_stm.readUTF():SFDC
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注:本文由纯净天空筛选整理自Preeti Jain大神的英文原创作品 Java ObjectInputStream readUTF() Method with Example。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。