import
java.util.*;
import java.io.*;
public class po1{ public static void
main(String[] args) throws Exception {
System.out.println("Hello!"); }}Random
generator = new Random();int x = generator.nextInt(20);Scanner
skaner = new Scanner(System.in);
int y = skaner.nextInt();
System.out.println("x
= " + x + ", y = " + y);PrintWriter writer
= new PrintWriter(new File("out.txt"));
writer.println("Ala ma kota");
writer.close();
skaner =
new Scanner(new File("out.txt"));
while(skaner.hasNext())
{
String str = skaner.next();
System.out.println(str);
}
skaner.close();
ArrayList<String>
list = new ArrayList<String>();
list.add("Białystok");
list.add("Warszawa");
list.add("Kraków");
for(String str : list)
System.out.println(str);
String str
= Collections.max(list);
Collections.sort(list);
lista.set(0,
"Wrocław");
String str = lista.get(1);int[] tab
= new int[10];for(int i = 0; i < tab.length; ++i) ... tab[i] ...using System;
using System.IO;
using System.Collections.Generic;
namespace po1
{
class MainClass
{
public
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Random rnd = new Random();
int x = rnd.Next(20);
string str = Console.ReadLine();
int y = int.Parse(str);
Console.WriteLine("x = " + x + ", y = "
+ y);
TextWriter writer = new
StreamWriter("out.txt");
writer.WriteLine("Ala ma kota");
writer.Close();
TextReader reader = new
StreamReader("out.txt");
string line;
while((line = reader.ReadLine()) != null)
Console.WriteLine(line);
reader.Close();
List<string> list = new
List<string>();
list.Add("Białystok");
list.Add("Warszawa");
list.Add("Kraków");
list.Sort();
list[0] = "Wrocław";
foreach(string s in list)
Console.WriteLine(s);
int[] ar = new int[10];
for(int i = 0; i < ar.Length; ++i)
ar[i] =
2*i+1;
foreach(int s in ar)
Console.WriteLine(s);
}
}
}