How to get value object inside object from hash map

Not sure what you are asking, but...

A) Cast the object you are getting from the map to the Object type you are trying to grab the values out of

String name = (String) subSourceMap1.get("name");

B) Add type parameters to your map

Map<String, String> subSourceMap1 = new HashMap<String, String>();
String name = subSourceMap1.get("name");
String address = subSourceMap1.get("address");

C) If you are wondering how to get those maps out of a list

Map<String, YourObject> subSourceMap1 = myMap.get(0); //This is index 0's of your map subsource
//You can grab index's from 'myMap' that are less than myMap.size();

This is a JSON string. Find a proper JSON deserializer library and include that in your project instead of coding all this HashMap stuff.. ;)

Ie this jackson-2-convert-object-to-from-json

    Map<String, Object> subSource2 = (Map<String, Object>)departmentPHSSuportEmail.get("SubSource");
    List<Map<String , Object>> myMap2  = (List<Map<String , Object>>)subSource2.get("value");
    Map<String,Object> subSourceMap3 = myMap2.get(0);
    String value = (String)subSourceMap3.get("value");

There are many ways how to solve this, one of solutions can be like this:

• make container for member data (address + name), if the addresses should be unique, than can be used as a key in map
• make container for attachment
• make container for the whole data, because of data integrity

Please, notice, I have used hashmap for members, but arraylist for attachments, if you are expecting also unique values at attachments, than you can use also hashmap with key name, then you can use it for finding

So..

Member container

public class Member {
    private String name;
    private String address;


    public Member(String name, String address) {
        super();
        this.name = name;
        this.address = address;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public String getAddress() {
        return address;
    }


    public void setAddress(String address) {
        this.address = address;
    }

Container for attachments

public class Attachment {
    String name;
    String value;


    public Attachment(String name, String value) {
        super();
        this.name = name;
        this.value = value;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public String getValue() {
        return value;
    }


    public void setValue(String value) {
        this.value = value;
    }
}

Than container for complete data

public class DataContainer {
    Map<String, Member> membersMap;
    ArrayList<Attachment> attachments;

    public DataContainer() {
        this.membersMap = new HashMap<String, Member>();
        this.attachments = new ArrayList<Attachment>();
    }

    public DataContainer(Map<String, Member> membersMap, ArrayList<Attachment> attachments) {
        super();
        this.membersMap = membersMap;
        this.attachments = attachments;
    }

    public Map<String, Member> getMembersMap() {
        return membersMap;
    }

    public void setMembersMap(Map<String, Member> membersMap) {
        this.membersMap = membersMap;
    }

    public ArrayList<Attachment> getAttachments() {
        return attachments;
    }

    public void setAttachments(ArrayList<Attachment> attachments) {
        this.attachments = attachments;
    }

    public void addAttachment(Attachment newItem) {
        this.attachments.add(newItem);
    }

    public void addMember(Member newMember) {
        this.membersMap.put(newMember.getAddress(), newMember);
    }

    public Member getMemberByAddress(String address) {
        return this.membersMap.get(address);
    }
}

Filling example

        Map<String, Member> membersMap= new HashMap<String, Member>();
        Member newMember = new Member("fooo Name", "[email protected]");
        membersMap.put(newMember.getAddress(), newMember);

        Attachment newAtatchment = new Attachment("fooattach", "something");
        ArrayList<Attachment> attachments = new ArrayList<>();
        attachments.add(newAtatchment);


        DataContainer data = new DataContainer(membersMap, attachments);

        data.addMember(new Member("anotherMember", "[email protected]"));
        data.addAttachment(new Attachment("another attachmetn", "anotherAtt value"));