例子
以下示例显示java.io.FileInputStream.close()方法的用法。
package com.jc2182;import java.io.IOException;
import java.io.FileInputStream;
public class FileInputStreamDemo {
public static void main(String[] args) throws IOException {
FileInputStream fis = null;
int i = 0;
char c;
try {
// create new file input stream
fis = new FileInputStream("C://test.txt");
// read byte from file input stream
i = fis.read();
// convert integer from character
c = (char)i;
// print character
System.out.println(c);
// close file input stream
fis.close();
System.out.println("Close() invoked");
// tries to read byte from close file input stream
i = fis.read();
c = (char)i;
System.out.println(c);
} catch(Exception ex) {
// if an I/O error occurs
System.out.println("IOException: close called before read()");
} finally {
// releases all system resources from the streams
if(fis!=null) {
fis.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-
IOException: close called before read()