Multiple events in one class? Need help!

I am new to development and recently ran into a problem. I am trying to make a chest protection plugin and am wondering how/if possible to have different event types in one class and work.

Code:

    public void onSignChange(SignChangeEvent event) {
        if (event.getLine(0).equalsIgnoreCase("[Lock]")) {
            event.setLine(0, "§c[Locked]");

            Player player = event.getPlayer();
            event.setLine(1, (ChatColor.AQUA + player.getName()));

Code:

    public void OnBlockPlaced(BlockPlaceEvent event) {
        if (event.getBlockPlaced().getType() == Material.SIGN && event.getBlockAgainst().getType() == Material.CHEST) {
            Player player = event.getPlayer();
            player.sendMessage(ChatColor.YELLOW + "Test");

Also how would I get the event of someone trying to open a chest? Thanks in advance

 

Code:

public void OnBlockPlaced(BlockPlaceEvent event) {
        if (event.getBlockPlaced().getType() == Material.SIGN && event.getBlockAgainst().getType() == Material.CHEST) {
            Player player = event.getPlayer();
            player.sendMessage(ChatColor.YELLOW + "Test");
        }
    }

    @EventHandler
    public void onSignChange(SignChangeEvent event) {
        if (event.getLine(0).equalsIgnoreCase("[Lock]")) {
            event.setLine(0, "§c[Locked]");

            Player player = event.getPlayer();
            event.setLine(1, (ChatColor.AQUA + player.getName()));

So like this?

 

Alright, I have the signs working but cannot figure out for the life of me how to only get it to work on a chest

Code:

    @EventHandler
    public void onSignChange(SignChangeEvent event) {
        if (event.getLine(0).equalsIgnoreCase("[Lock]")) {
            event.setLine(0, "§c[Locked]");
            Player player = event.getPlayer();
            if (event.getLine(1).equalsIgnoreCase(player.getName()))
                player.sendMessage(ChatColor.YELLOW + "Test");
            else event.setLine(0, (ChatColor.DARK_RED + "ERROR: {Name}"));

 

I'm a noob, how would one do that?

 

@DubstepR3mix
No one here will spoonfeed you code if that is what you're asking for.

Here is a more detailed explanation of what you need to do.

1. Set up the interact event and checking if the clicked block is a chest.
2. Create a for loop for all four sides of the block, and use the Block#getRelative(BlockFace) method to get the blocks north,south,east, and west of the chest.
   
3. For each block, test if the block's type is equal to WALL_SIGN (Not to be confused with SIGN, which is the item).
4. If the block is a WALL_SIGN, get the Sign instance by using the following
   Code:

   Sign sign = (Sign) BLOCK#getState();

   What this does is return the Sign's data.
5. Using that sign instance. Use sign.getLine( int ) to get a line of the sign. Note that int represents the line you wish to get, where the first line is '0'.
6. After that, do the checks you want.

 

make sure every events has their own EventHandler to make all events working in just 1 class.