hCore allows you to message with player with any way you want.
BossBars
You can easily create bossbar, set color to it, bar style, title, and add players which will se this bossbar.
Example usage:
HBossBar myBossBar = HCore.createBossBar("Title", HBarColor.WHITE, HBarStyle.SOLID); // creates bossbar with color white
myBossBar.setColor(HBarColor.RED); // changes it's color to red myBossBar.addPlayer(player); // allows player to see the bossbar
Titles
You can easily send titles to player. Set animation speed for it, and change content for title.
Example usage:
HTitle myTitle = new HTitle("Title", "Subtitle", 5, 3, 2); // created a title with title "Title" and subtitle "Subtitle" which appears in 3 ticks, disappears in 2 ticks so totally exists for 5 ticks
HCore.sendTitle(player, myTitle); // sent title to player
Action Bars
You can also easily send action bars to player, and change content to it.
Example usage:
HCore.sendActionBar(player, "Welcome back, " + player.getDisplayName()); // sent a simple actionbar to player with string "Welcome, playerName"