Java 为什么简单FileInputStream行返回异常?
按钮动作Java 为什么简单FileInputStream行返回异常?,java,apache-poi,fileinputstream,Java,Apache Poi,Fileinputstream,按钮动作 private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { try { // TODO add your handling code here: deneme(); } catch (IOException ex) { Logger.getLogger(MainFrame.class.
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
try {
// TODO add your handling code here:
deneme();
} catch (IOException ex) {
Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);
}
}
文件读取无效
public void deneme() throws FileNotFoundException, IOException{
try {
FileInputStream file2 = FileInputStream (new File("D:\\Ornek.xls"));
HSSFWorkbook workbook;
workbook = new HSSFWorkbook(file2);
HSSFSheet sheet = workbook.getSheetAt(0);
HSSFRow row1 = sheet.getRow(0);
HSSFCell cellA1 = row1.getCell((short) 0);
String a1Val = cellA1.getStringCellValue();
HSSFCell cellB1 = row1.getCell((short) 1);
String b1Val = cellB1.getStringCellValue();
HSSFCell cellC1 = row1.getCell((short) 2);
String c1Val = cellC1.getStringCellValue();;
System.out.println("A1: " + a1Val);
System.out.println("B1: " + b1Val);
System.out.println("C1: " + c1Val);
}
catch (IOException ex) {
Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null,ex);
}
}
当我调试它时,我接受下面的异常
Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet.
FileInputStream行引发异常。我错过什么了吗
谢谢
--已解决--
很抱歉先问了个愚蠢的问题:)
new
开头缺少关键字。多亏了@dkatzel我想你错过了新的
关键词
试试这个:
FileInputStream file2 = new FileInputStream (new File("D:\\Ornek.xls"));
但是,这应该是一个编译错误,而不是运行时错误。哪一行会引发该异常?请发布stacktrace。您的意思是
新文件输入流(新文件等)
在那里吗?相关问题-如果您有文件对象。因为,直接使用文件具有更低的内存占用,而且速度更快!啊,你是对的:(很遗憾,我并没有在线编译错误。应用程序工作但转为异常。
FileInputStream file2 = new FileInputStream (new File("D:\\Ornek.xls"));