Объясните пожалуйста как это делается.
package com.javarush.task.task06.task0610;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Класс ConsoleReader
*/
public class ConsoleReader {
public static String readString() throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String readString = reader.readLine();
return readString;
}
public static int readInt() throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int a = Integer.parseInt(reader.readLine());
return a;
}
public static double readDouble() throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
double a = Double.parseDouble(reader.readLine());
return a;
}
public static boolean readBoolean() throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
boolean a = Boolean.getBoolean(reader.readLine());
boolean a1 = a;
return a1;
}
public static void main(String[] args) {
}
}