Hi all,
I cannot seem to grasp the use of wrapper classes, or rather how to use them. I am in the middle of practicing for an exam tommorrow but I am a little stumped with the following task:
Create an overloaded setValue method that recieves a String parameter. This method is set the field value. You will need to use the wrapper class to convert the String parameter to the value field's type of double.
I will show you what I have done so far:
package order;
public class Order {
private int orderNo;
private String supplier;
private double value;
public Order(int orderNo, String supplier, double value){
this.orderNo = orderNo;
this.supplier = supplier;
this.value = value;
[B]}
public void setValue(String value){
double s = Double.parseDouble(value);
}[/B]
public void setOrderNo(int o){
orderNo = o;
}
public void setSupplier(String s){
supplier = s;
}
public void setValue(double v){
value = v;
}
public int getOrderNo(){
return orderNo;
}
public String getSupplier(){
return supplier;
}
public double getValue(){
return value;
}
}I have made bold the part where I am going wrong.
Now I have created a tester as follows:
package order;
public static void main(String[] args) {
Order o1 = new Order(1002,"Tremble supplies",320.60);
o1.setValue("90.68");
System.out.println("test value "+o1.getValue());
}
}but my output is :
run:
test value 320.6
BUILD SUCCESSFUL (total time: 0 seconds)where it should be "test value 90.68"
I hope I have been clear here, if not let me know.
So bassically what I am not to sure on is the bolded code (not sure about the parameters and variables ive used either), I have not had much practice with overloaded methods with wrapper classes. I could not find many examples online as at this stage we do not use java.util for example.
I look forward to any suggestions.
