package com.sachinhandiekar.examples;

public final class Constants {

    /**
     * Config Properties
     */
    public static final String CLIENT_ID = "instagram.clientId";
    public static final String CLIENT_SECRET = "instagram.clientSecret";
    public static final String REDIRECT_URI = "instagram.redirectUri";

    /**
     * Http Session Attributes
     */
    public static final String INSTAGRAM_OBJECT = "igObject";
    public static final String INSTAGRAM_SERVICE = "igService";

    public static final int MAX_PAGE_SIZE = 5;
}

package com.sachinhandiekar.examples;

public final class Constants {

    /**
     * Config Properties
     */
    public static final String CLIENT_ID = "IG_CLIENT_ID";
    public static final String CLIENT_SECRET = "IG_CLIENT_SECRET";
    public static final String REDIRECT_URI = "IG_REDIRECT_URL";


    /**
     * Http Session Attributes
     */
    public static final String INSTAGRAM_OBJECT = "igObject";
    public static final String INSTAGRAM_SERVICE = "igService";

    public static final int MAX_PAGE_SIZE = 5;
}

Update Constants.java