How to set Json string array to Java object using Java

Following is your JSON string.

{
  "status": "FOUND",
  "messages": null,
  "sharedLists": [
    {
      "listId": "391647d",
      "listName": "/???",
      "numberOfItems": 0,
      "colla   borative": false,
      "displaySettings": true
    }
  ]
}

Clearly sharedLists is a JSON array within the outer JSON object.

So I have two classes as follows (created from http://www.jsonschema2pojo.org/ by providing your JSON as input)

ResponseObject - Represents the outer object

 public class ResponseObject {

        @SerializedName("status")
        @Expose
        private String status;
        @SerializedName("messages")
        @Expose
        private Object messages;
        @SerializedName("sharedLists")
        @Expose
        private List<SharedList> sharedLists = null;

        public String getStatus() {
            return status;
        }

        public void setStatus(String status) {
            this.status = status;
        }

        public Object getMessages() {
            return messages;
        }

        public void setMessages(Object messages) {
            this.messages = messages;
        }

        public List<SharedList> getSharedLists() {
            return sharedLists;
        }

        public void setSharedLists(List<SharedList> sharedLists) {
            this.sharedLists = sharedLists;
        }

    }

and the SharedList - Represents each object within the array

public class SharedList {

    @SerializedName("listId")
    @Expose
    private String listId;
    @SerializedName("listName")
    @Expose
    private String listName;
    @SerializedName("numberOfItems")
    @Expose
    private Integer numberOfItems;
    @SerializedName("colla borative")
    @Expose
    private Boolean collaBorative;
    @SerializedName("displaySettings")
    @Expose
    private Boolean displaySettings;

    public String getListId() {
        return listId;
    }

    public void setListId(String listId) {
        this.listId = listId;
    }

    public String getListName() {
        return listName;
    }

    public void setListName(String listName) {
        this.listName = listName;
    }

    public Integer getNumberOfItems() {
        return numberOfItems;
    }

    public void setNumberOfItems(Integer numberOfItems) {
        this.numberOfItems = numberOfItems;
    }

    public Boolean getCollaBorative() {
        return collaBorative;
    }

    public void setCollaBorative(Boolean collaBorative) {
        this.collaBorative = collaBorative;
    }

    public Boolean getDisplaySettings() {
        return displaySettings;
    }

    public void setDisplaySettings(Boolean displaySettings) {
        this.displaySettings = displaySettings;
    }

}

Now you can parse the entire JSON string with GSON as follows

Gson gson = new Gson();
ResponseObject target = gson.fromJson(inputString, ResponseObject.class);

Hope this helps.