例子
以下示例显示java.io.StringReader.close()方法的用法。
package com.jc2182;
import java.io.*;
public class StringReaderDemo {
public static void main(String[] args) {
String s = "Hello World";
// create a new StringReader
StringReader sr = new StringReader(s);
try {
// read the first five chars
for (int i = 0; i < 5; i++) {
char c = (char) sr.read();
System.out.print("" + c);
}
// change the line
System.out.println();
// close the stream
sr.close();
//try to access the reader after it is closed
try {
sr.ready();
} catch (Exception ex) {
// catch the exception and print a message if reader is closed
System.out.println("Reader is closed.");
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
让我们编译并运行以上程序,这将产生以下结果-
Hello
Reader is closed.