使用LinkedHashMap进行迭代和分配

Question

I have LinkedHashMap<String,List<SelectItem>> results = got the results from DB see here

I need to assign the above results to the lists available in UI using for loop.

for (Map.Entry<String, List<SelectItem>> entry : results.entrySet()) {
        String key = entry.getKey();
        List<SelectItem> values = entry.getValue();
        System.out.println("Key = " + key);
        System.out.println("Values = " + values + "n");
}

Assigning part example :

if(key.equalsIgnoreCase("getProjectManager")) {
        tempselectedProjMgrList = entry.getValue();                             
}

Based on the key I am adding the values to a diff list like the one i said in the given link above.

The above sys out does not print the acutal values inside the list instead it prints like the one given below ..

Key = getProjectManager
Values = [javax.faces.model.SelectItem@fadb0a,javax.faces.model.SelectItem@1245c45]n
Key = getResourceOwnerSE
Values = [javax.faces.model.SelectItem@25f52c, javax.faces.model.SelectItem@323fc] <br/>

How to get the actual values from the above list.

Answer 1

SelectItem did'nt override the toString() method herited from the Object class which is :

getClass().getName() + '@' + Integer.toHexString(hashCode())

That's why you get such an output.

So you'll have to loop through all the values and call getValue() . That will call the toString() method on the value object hold by the SelectItem .

System.out.println("Key = " + key);
System.out.println("Values = "); 
for(SelectItem st : values){
    System.out.print(st.getValue()+" ");
}
System.out.println();

EDIT:

If you want directly to get the appropriated list with the key associated, just do

tempselectedResOwnSeList = results.get("getProjectManager");

Answer 2

You can do the below:

First create a toString method for your SelectItem class with all the info you want to be printed . For example:

public class SelectItem {

private int a;
private String b;

@Override
public String toString() {
    return "SelectItem [a=" + a + ", b=" + b + "]";
}

}

then do:

for (Map.Entry<String, List<SelectItem>> entry : results.entrySet()) {
                       String key = entry.getKey();
                        List<SelectItem> values = entry.getValue();
                        System.out.println("Key = " + key);
                        System.out.print("Values = ");}
                        for (SelectItem selectItem : values){
                            System.out.print(selectItem.toString() +    "n");
                        }
}