Solved List<String> toUpperCase()?

Is it possible to set a List<String> toUpperCase()?

Code:

public List<String> worlds;
worlds = [I]getConfig().[/I]getStringList("world-list"); #// I want ALL of these to be converted toUpperCase().

I am wanting to set all of List<String> in the config toUpperCase() and stored in a public List<String>. So when later I check if worlds.contains() it will check the worlds List<String> and they will all be UpperCase,

 

@XSilverSlayerX

1. [ code=java].
2. To do what you want, loop through all the contents in the list and use .toUpperCase() on each string. Then add those updated strings to a new list.

 

I tried that already but I am fetching errors.

Code:

public List<String> worlds;
List<String> worldlist = getConfig().getStringList("world-list");

for(String worldsUpperCase : worldlist){

String maybe = worldsUpperCase.toUpperCase();

worlds.add(maybe); #// Is the line 53 in the error.

}

Errors:

Code:

[12:38:52] [Server thread/ERROR]: Error occurred while enabling TestPlugin v1.0 (Is it up to date?)
java.lang.NullPointerException
at me.RockinChaos.testplugin.TestPlugin.onEnable(TestPlugin.java:53) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot.jar:git-Spigot-d97e08b-5e85956]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot.jar:git-Spigot-d97e08b-5e85956]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-d97e08b-5e85956]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:356) [spigot.jar:git-Spigot-d97e08b-5e85956]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:316) [spigot.jar:git-Spigot-d97e08b-5e85956]
at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [spigot.jar:git-Spigot-d97e08b-5e85956]
at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [spigot.jar:git-Spigot-d97e08b-5e85956]
at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [spigot.jar:git-Spigot-d97e08b-5e85956]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [spigot.jar:git-Spigot-d97e08b-5e85956]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:524) [spigot.jar:git-Spigot-d97e08b-5e85956]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_75]

 

This would be my guess:

Code:

        List<String> uppercaseWorlds = config.getStringList("world-list");
        for(int i=0; i<uppercaseWorlds.size();i++) {
            uppercaseWorlds.set(i, uppercaseWorlds.get(i).toUpperCase());
        }

Or with Java 8:

Code:

List<String> uppsercaseWorld = config.getStringList("world-list").stream().map(s->s.toUpperCase()).collect(Collectors.toList());

 

@XSilverSlayerX You never instantiate the variable "worlds".

EDIT: Too late

 

I hate Lambda expressions, (Mainly because I find them hard to read)

 

Thank you, Exactly what I was looking for