Snippets
Created by
Karol Preiskorn
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | /**
*
* SumN - java examples
*
*/
package SumN;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
/*
* https://slf4j.org/manual.html
*/
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* main class
*
*/
public class SumN {
/**
* @param args
* the command line arguments
*/
static Logger logger = LoggerFactory.getLogger("SumN");
public static void main(String[] args) throws FileNotFoundException, UnsupportedEncodingException {
logger.info("start");
// TODO code application logic here
int suma; //
int rn;
int dodatnie;
dodatnie = 0;
suma = 0;
System.out.println("Z1P1\n");
int firstArg = 0;
if (args.length > 0) {
try {
firstArg = Integer.parseInt(args[0]);
if (firstArg < 5) {
System.err.println("Argument" + args[0] + " musi był większy od zera.");
System.exit(1);
}
} catch (NumberFormatException e) {
System.err.println("Argument" + args[0] + " must be an integer.");
logger.error("Argument" + args[0] + " must be an integer.");
System.exit(1);
}
for (int i = 5; i <= firstArg; i++) {
suma += i;
}
System.out.println("Suma kolejnych liczb całkowitych od 5 do " + args[0] + " wynosi " + suma);
} else {
for (int i = 5; i <= 1000; i++) {
suma += i;
}
System.out.println("Suma kolejnych liczb całkowitych od 5 do 1000 " + suma);
}
System.out.println("\nZ1P2\n");
System.out.println("Utwórz tablice 5-cio elemntową i wygeneruj do niej wartości z przedziału <-10, 10>");
// deklaracja tablicy
int[] myIntArray = new int[5];
System.out.print("myIntArray[5] = { ");
for (int i = 0; i < 5; i++) {
rn = -10 + (int) (Math.random() * 20);
myIntArray[i] = rn;
System.out.print(rn);
if (i < 4) {
System.out.print(", ");
}
}
System.out.print(" }\n ");
System.out.println("\nZ1P3\n");
System.out.println("Oblicza ile jest dodatnich elementów w tablicy myIntArray");
for (int i = 0; i < 5; i++) {
if (myIntArray[i] > 0) {
dodatnie++;
}
}
System.out.print("W tablicy myIntArray[5] jest/sa " + dodatnie + " dodatnie elementy");
// http://stackoverflow.com/questions/2885173/how-to-create-a-file-and-write-to-a-file-in-java#2885224
try (PrintWriter writer = new PrintWriter("dodatnie.txt", "UTF-8")) {
writer.println("W tablicy myIntArray[5] sa " + dodatnie + " dodatnie elementy");
writer.close();
} catch (IOException e) {
}
try (Writer writer = new BufferedWriter(
new OutputStreamWriter(new FileOutputStream("dodatnie2.txt"), StandardCharsets.UTF_8))) {
writer.write("W tablicy myIntArray[5] sa " + dodatnie + " dodatnie elementy");
} catch (IOException ex) {
// handle me
}
System.out.println("\n\nEND\n");
logger.info("end");
}
}
|
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