CODEWITHSUNDEEP
javaif-statementnetbeans
Tristan
Tristan

Reputation: 13

My if statement which worked before no longer works

I am trying to create an if else statement that checks multiple values, one after another, to see whether they are null or not.

The if else statement that I created worked perfectly earlier, but after restarting my pc it no longer works.

Any help is appreciated.

Here is my code:

    //Declare Strings
    String ProjectNo, Location, VP;

    //Store values from text boxes into strings
    ProjectNo = txtProjectNum.getText();
    Location = txtLocation.getText();
    VP = txtVPNo.getText();


    if(ProjectNo == null){

        JOptionPane.showMessageDialog(null, "No fields can be left empty!");

    }

    else if (Location == null){

        JOptionPane.showMessageDialog(null, "No fields can be left empty!");

    }

    else if (VP == null){

        JOptionPane.showMessageDialog(null, "No fields can be left empty!");

    }

    else{

        JOptionPane.showMessageDialog(null, "All fields have been filled in!");

    }

Upvotes: 1

Views: 59

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074276

I'm fairly sure the getText method never returns null. If you want to check for an empty field, check .length() == 0 or .isEmpty. You might consider .trim() first. E.g.:

if (projectNo.trim().isEmpty()) {

Or perhaps trim when getting the text into the variable:

projectNo = txtProjectNum.getText().trim();
// ...
if (projectNo.isEmpty()) {

Upvotes: 3

Related Questions