Cannot make a static reference to the non-static method and specialChars cannot be resolved errors

So I searched if someone before me wanted to know how a typing text works and found this here how-to-add-java-typing-text but the code from Vogel612 gives me errors on "Random.nextInt(40)..." and specialChars.contains...". Btw im a beginner so pls answer like you would answer a beginner xD.

Here is the code I have in my class:

import java.util.Random;
public class Buildingtext {
public static void main(String[] args) {

    // TODO Auto-generated method stub
    String text="bla zzz  ´` asdasdasda y yyyx sdsy sddx";
    for (char c : text.toCharArray()) {
        // additional sleeping for special characters
        if (specialChars.contains(c)) {
           Thread.sleep(Random.nextInt(40) + 15);
        }
        System.out.print(c);
        Thread.sleep(Random.nextInt(90) + 30);
    }
}
}

The "specialChars" error says : specialChars cannot be resolved.

Both Random.nextInt() errors say : cannot make a static reference to the non-static method nextInt(int) from the type Random.

I really need help thanks guys D´: