1. import java.io.*;
2. import java.util.Scanner;
3. /**
4. *
5. * @author jmkoz_000
6. */
7. public class JavaApplication5 {
8. public static void odczyt1(String name) throws IOException {
9. FileReader in = null;
10. try {
11. in = new FileReader(name);
12. int znak = in.read();
13. while (znak != -1) {
14. System.out.print((char) znak);
15. znak = in.read();
16. }
17. } catch (FileNotFoundException ex) {
18. System.out.println(ex.toString());
19. } finally {
20. if (in != null) {
21. in.close();
22. }
23. }
24. }
25. public static void odczyt2(String name) throws IOException {
26. BufferedReader in = null;
27. try {
28. in = new BufferedReader(new FileReader(name));
29. String line;
30. while((line = in.readLine())!=null){
31. System.out.println(line);
32. }
33. } catch (FileNotFoundException ex) {
34. System.out.println(ex.toString());
35. } finally {
36. if (in != null) {
37. in.close();
38. }
39. }
40. }
41. public static void odczyt3(String name) throws IOException {
42. Scanner in = null;
43. try {
44. in = new Scanner(new FileReader(name));
45. int suma = 0;
46. while(in.hasNext()){
47. if(in.hasNextInt()){
48. suma += in.nextInt();
49. } else{
50. in.next();
51. }
52. }
53. System.out.println(suma);
54. } finally {
55. if (in != null) {
56. in.close();
57. }
58. }
59. }
60. public static void zapis(String nazwa) throws IOException {
61. FileWriter out = null;
62. try{
63. out = new FileWriter(nazwa, true);
64. out.write("Ala ma kota i psa\r\n");
65. } finally {
66. if (out != null) {
67. out.close();
68. }
69. }
70. }
71. public static void zapis2(String nazwa) throws IOException {
72. PrintWriter out = null;
73. try{
74. out = new PrintWriter(new FileWriter(nazwa, true));
75. out.printf("abc %.2f def", Math.PI);
76. } finally {
77. if (out != null) {
78. out.close();
79. }
80. }
81. }
82. public static void main(String[] args) throws IOException {
83. //odczyt2("src/javaapplication5/JavaApplication5.java");
84. //odczyt3("abc.txt");
85. zapis2("nowy.txt");
86. }
87. }