例子
以下示例显示java.io.InputStreamReader.close()方法的用法。
package com.jc2182;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
public class InputStreamReaderDemo {
public static void main(String[] args) throws IOException {
FileInputStream fis = null;
InputStreamReader isr = null;
int i;
char c;
try {
// new input stream reader is created
fis = new FileInputStream("C:/test.txt");
isr = new InputStreamReader(fis);
// input stream reader is closed
isr.close();
System.out.print("close() invoked");
// read() called after closed method
i = isr.read();
c = (char)i;
System.out.println(c);
} catch (Exception e) {
// print error
System.out.print("The stream is already closed");
} finally {
// closes the stream and releases resources associated
if(fis!=null)
fis.close();
if(isr!=null)
isr.close();
}
}
}
假设我们有一个文本文件c:/test.txt ,其内容如下。该文件将用作示例程序的输入-
让我们编译并运行以上程序,这将产生以下结果-
close() invokedThe stream is already closed