Question

I need to retrieve data from db, if no data found in dB i need to fire a popup window in java. im giving the code here which i write to handle but unable to handle it.

String SectorCode = employerProfile.getSectorCode().getSectorTypeId();
String IndustrialCode = employerProfile.getIndustrialCode().getIndustryTypeId();
try{
    if(SectorCode==null || IndustrialCode==null){
        JOptionPane.showMessageDialog(null, "Record not found" );
    }
}catch(Exception ex){
    ex.printStackTrace();
}

Please suggest me the solution... Thanks in advance

Answer 1

这样做的一个新途径是......(你提到你正在成为无意义的例外)

String SectorCode = null;
String IndustrialCode = null;
try{
  SectorCode = employerProfile.getSectorCode().getSectorTypeId();
  IndustrialCode = employerProfile.getIndustrialCode().getIndustryTypeId();
  ...
}catch(Exception ex){
    if(SectorCode==null || IndustrialCode==null){
       JOptionPane.showMessageDialog(null, "Record not found" );
    }
}

Answer 2

如果“>>>>不适用,则第2条线中的方法电话中可能会出现例外情况。查询:employerProfile.getSectorCode().getSectorTypeId();和employerProfile.getIndustrialCode().getIndustryTypeId(); 适当执行,无任何例外。

Answer 3

视数据库而定,你使用和(或)如何设立,你可能需要检查空洞:

if(SectorCode==null || IndustrialCode==null || SectorCode.length() == 0 || IndustrialCode.length() == 0) {

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