Take different actions depending on jTextField value

Question

I have many more cases, but I'm wondering if there is a simpler way to do this. If the user enters 1 the program will convert from inches to cm, if the user enters 2, the program will convert from cm to feet, etc.

if (jTextField1.getText() == 1) {
    InchesToCm();
} else if (jTextField1.getText() == 2) {
    CmToFeet();
} else if (jTextField1.getText() == 3) {
    MetresToYards();
} else if (jTextField1.getText() == 4) {
    KmToMetres();
} else {
    jLabel8.setText("Error, try again");
}

Answer 1

It depends on your definition of 'simpler' but you could use a switch statement. Like so:

switch(Integer.parseInt(jTextField1.getText())){
case 1:
    InchesToCm();
    break;
case 2:
    CmToFeet();
    break;
case 3:
    MetresToYards();
    break;
case 4:
    KmToMetres();
    break;
    default:
        jLabel8.setText("Error, try again");
        break;
}

This way you don't have to use a chain of if statements but if it's simpler is up to you.

I hope this helps :)