ControlP5 Logic problem

Contributed Library Questions

june55936

in Contributed Library Questions • 1 year ago

I have a java file and a processing file.

FoodData.txt looks like this:

ham

100

corn

15.5

In the function checkForFile(),

println (food[x].toString()) gives the right information as:

ham

100

corn

15.5

However, when I use the function LIST() to the textarea called searchList.

The information of ham changes into that of the corn like this:

ham

15.5

corn

15.5...

you need to compare the two in the interactive console, not on the actual window.

import controlP5.*;
ControlP5 controlP5;
//INPUT
Textfield search;
//OUTPUT
Textarea searchList;
Textarea console;
//FOOD
final int maxFood = 100;
private Food []food = new Food[maxFood];
private int numFood = 0;
void setup()
{
size(1000,500);
background(255);
frameRate(30);
controlP5 = new ControlP5(this);
//Search
search = controlP5.addTextfield("",50,50,150,20);
controlP5.addButton("SEARCH",0,210,50,50,20);
searchList = controlP5.addTextarea("lable1","List",50,90,150,300);
searchList.setColorBackground(0xff0066cc);
//List
controlP5.addButton("LIST",1,210,70,50,20);
//Console
console = controlP5.addTextarea("Console","Console",50,400,300,100);
console.setColorBackground(0xff0066cc);
}
void draw()
{
}
//Search Button
public void SEARCH(int theValue) {
console.setText("Searching...");
if(checkForFile()) {
console.setText("Data file located and loaded with "+ numFood + ".");
}
}
//List
public void LIST(){
String total ="";
for (int x = 0; x<numFood;x++)
{
total += food[x].toString() +"\n";
println (food[x].toString());
}
searchList.setText(total);
}
//Check for the validity of database
private boolean checkForFile() {
try {
BufferedReader inFile = createReader("FoodData.txt");
String name;
int x = 0;
double nutrient[] = new double[5];
while((name=inFile.readLine()) != null) {
for (int p = 0; p<5; p++)
{
nutrient[p] = Double.parseDouble(inFile.readLine());
}
food[x] = new Food(name,nutrient);
println(food[x].toString());
x++;
}
numFood = x;
LIST(); //List function
inFile.close();
return true;
}
catch (IOException io) {
println(io.getMessage());
}
return false;
}

Java:

public class Food {
private double info[];
private String name;
public Food(String name,double []info) {
setFoodName(name);
setInfo(info);
}
public String getFoodName() {
return name;
}
public void setFoodName(String name) {
this.name = name;
}
public double[] getInfo() {
return info;
}
public void setInfo(double[] info) {
this.info = info;
}
public String toString() {
String result = "";
result += name +"\n-----------\n"+"Calorie: "+ info[0]+"\n"+
"Fat: "+info[1]+ "\n" + "Cholesterol: "+ info[2] +"\n"+"Sodium: " + info[3] +"\n" +
"Protein: "+ info[4]+"\n";
return result;
}
}

Replies(1)

andreas.s..

when parsing the textfile inside checkForFile(), the array nutrient is passed by reference not by copy, therefore Food.info will always link to array nutrient and its latest entries. you need to copy the array over into info[] when passed to your Food object, or you need to create a new nutrient array for each cycle inside your while loop inside checkForFile().

while((name=inFile.readLine()) != null) {
double nutrient[] = new double[5];
for (int p = 0; p<5; p++)
{
nutrient[p] = Double.parseDouble(inFile.readLine());
}
food[x] = new Food(name,nutrient);
x++;
}

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