my java program skip steps

Question

So my program works fine until the end where it has to calculate and then show the results.It just show the result without calculating the "if" at the end.

 public class Convertisseur1 {
    public static void main(String[] args) {
    String valeurInitial;
    String valeurPoid;
    String valeurDesire;
    String valeurInitial2;
    String valeurInitial3;

    //seperation des string
    valeurInitial = (args[0]);
    valeurInitial2 = (args[0]);
    valeurDesire = (args[1]);
    valeurInitial3 = (args[0]);

    valeurInitial = valeurInitial.replace("kg",""); 
    valeurInitial = valeurInitial.replace("g","");      
    valeurInitial = valeurInitial.replace("t","");      
    valeurInitial = valeurInitial.replace("lb","");     
    double valeurdouble = Double.parseDouble(valeurInitial);

    valeurInitial2 = valeurInitial2.substring(valeurInitial2.length()-2);
    valeurInitial3 = valeurInitial3.substring(valeurInitial3.length()-1);       
    //convertion    
    System.out.println(valeurInitial2);
    System.out.println(valeurDesire);
    System.out.println(valeurdouble);
    if(valeurInitial2 == "kg" &&valeurDesire == "g"){
        valeurdouble = (valeurdouble*1000); 
        System.out.println("La convertion finale : " + valeurdouble);
    }else if(valeurInitial2 == "kg"&&valeurDesire == "lb")
        valeurdouble = (valeurdouble/2.2046226);

    /*System.out.println(valeurdouble);
    //System.out.println(valeurPoid);
    System.out.println(valeurDesire);
    System.out.println(valeurInitial2);
    System.out.println(valeurInitial3);*/

    }
}

Voting to close as yet another String comparison question. – Matt Clark Oct 01 '15 at 05:21 — Matt Clark, Oct 01 '15 at 05:21

Ramiro Gutierrez Alaniz · Answer 1 · 2015-10-01T05:18:17.207

3

You are missing the {} on the else if and It doesn't print anything at the last if because it needs another System.out.println() as it isn't a loop.

}else if(valeurInitial2.equals( "kg" ) && valeurDesire.equals("lb" ) ){
    valeurdouble = (valeurdouble/2.2046226);
    System.out.println("La convertion finale : " + valeurdouble);
}

edited Oct 01 '15 at 05:18

answered Oct 01 '15 at 03:10

Ramiro Gutierrez Alaniz

31
3

ty for the answer but the program still skips the calculation here is what i get on cmd when i enter 8kg g cmd: kg g 8.0 then it end – Brian mon Oct 01 '15 at 03:36
Well, I see you use "==" to compare strings, in java you need to use .equals function to compare strings. – Ramiro Gutierrez Alaniz Oct 01 '15 at 05:15
if(valeurInitial2.equals( "kg" ) && valeurDesire.equals( "g" )){ //stuff } – Ramiro Gutierrez Alaniz Oct 01 '15 at 05:16
it works thanks alot Ramiro! – Brian mon Oct 01 '15 at 13:38

my java program skip steps

1 Answers1