new Dialogue() {

            @Override
            public DialogueType type() {
                return DialogueType.PLAYER_STATEMENT; // or DialogueType.NPC_STATEMENT
            }

            @Override
            public DialogueExpression animation() {
                return DialogueExpression.NORMAL;
            }

            @Override
            public String[] dialogue() {
                return new String[]{"Hello npc", "This is line 2 of the player", "This is line 3 of the player", "This is line 4 of the player"};
            }

            public Dialogue nextDialogue() {
                new Dialogue() {
            @Override
            public DialogueType type() {
                return DialogueType.NPC_STATEMENT;
            }

            @Override
            public DialogueExpression animation() {
                return DialogueExpression.NORMAL;
            }

            @Override
            public int npcId() {
                return npcidhere; // the npc id
            }

            @Override
            public String[] dialogue() {
                return new String[]{"Hello PLAYER i am the npc", "This is line 2 of the npc", "This is line 3 of the npc", "This is line 4 of the   npc"};
                    }
                }
            }