Question

所以我的程序工作正常，直到它必须计算结束然后显示结果。它只显示结果而不计算＆＃34;如果＆＃34;最后。

 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);*/

    }
}

Answer 1

如果因为它不需要另一个System.out.println（）因为它不是一个循环，那么你错过了else上的{}并且它不会在最后打印任何内容。

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

我的java程序跳过步骤

1 个答案: