JAVA String to Integer & String to Double and opposite!

Beispiel - Java convert String to Integer & ConvertIntToString



public class ConvertIntToString {
  public static void main(String[] args) {

    int aInt = 1;

    String aString = Integer.toString(aInt);

  }
}



public class ConvertStringToInt {
  public static void main(String[] args) {
    String aString = "78";
    int aInt = Integer.parseInt(aString);

    System.out.println(aInt);
  }
}


Java String to Double & Double.toString



String myString = Double.toString(aDouble);


double aDouble = Double.parseDouble(aString);


Java Example: Converting boolean to String

Einfach boolean convertierung zu String mit der Wrapperklasse. Wandlung (boxing/unboxing) des Ordinaltyp boolean mit Hilfe der Wrapperklasse Boolean



String myString = Boolean.toString(boovar2);



public class BooleanToString {
    public static void main(String[] args) {

        /* Method 1: using valueOf() method
         * of String class.
         */
        boolean boovar = true;
        String str = String.valueOf(boovar);
        System.out.println("String is: "+str);

        /* Method 2: using toString() method
         * of Boolean class
         */
        boolean boovar2 = false;
        String str2 = Boolean.toString(boovar2);
        System.out.println("String2 is: "+str2);
    }
}



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