Struts 1 : Put values of a jsp into form that uses a java List

Question

In my jsp, I have some fields like this :

<html:text property="field[0]" value="${fieldValue}" indexed="true">
<html:text property="field[1]" value="${fieldValue}" indexed="true">
<html:text property="field[2]" value="${fieldValue}" indexed="true">
<html:text property="field[3]" value="${fieldValue}" indexed="true">

And in my form I have a java.util.list that I need to populate from the fields on top :

private List<Double> field = new ArrayList<Double>();

public final List<Double> getField() {
    return field;
}
public final void setField(final List<Double> valeur) {
    this.field = valeur;
}

The problem is that the list is not populated. Any ideas ??? Thanks !!

Answer 1

Simply do this

<html:text property="field[0]" value="${fieldValue}" indexed="true">
<html:text property="field[1]" value="${fieldValue}" indexed="true">
<html:text property="field[2]" value="${fieldValue}" indexed="true">
<html:text property="field[3]" value="${fieldValue}" indexed="true">

And in the form :

private String[] field = new String[0];

public final String getField(int index) {
    return field[index];
}
public final void setField(int index, String value) {
    //Copy last values of the array into a temporary array, then add the new value
    String[tmp] = new String[index + 1];
    for(int i=0; i<field.length; i++){
        tmp[i] = field[i];
    }
    tmp[index] = value;
    this.field = tmp;
}