1
2
3
4
5
6 package integration.tests.loops;
7
8 import java.util.Collection;
9 import java.util.Iterator;
10 import java.util.List;
11
12 public class ForStatements {
13 void forInSeparateLines() {
14 for (int i = 0; i < 2; i++) {
15 System.gc();
16 }
17 }
18
19 void forInSingleLine(int i) {
20
21 for (; i < 2; i++) { System.gc(); }
22
23 }
24
25 int forEachArrayElement(int... values) {
26 int sum = 0;
27
28 for (int value : values) {
29 sum += value;
30 }
31
32 return sum;
33 }
34
35 String forEachCollectionElement(List<String> values) {
36 StringBuilder result = new StringBuilder();
37
38 for (String value : values) {
39 result.append(value);
40 }
41
42 return result.toString();
43 }
44
45 void forUsingIterator(Collection<? extends Number> values) {
46 for (Iterator<? extends Number> itr = values.iterator(); itr.hasNext();) {
47 Number value = itr.next();
48
49 if (value.intValue() == 0) {
50 itr.remove();
51 }
52 }
53 }
54
55 int forWithBreakAndContinue(int i) {
56 for (; i < 2; i++) {
57 if (i == 1) {
58 i = 3;
59 continue;
60 }
61
62 if (i < 0) {
63 break;
64 }
65 }
66
67 return i;
68 }
69
70 void nestedFor(List<Integer> list) {
71 for (Integer i : list) {
72 for (int j = 0; j < i; j++) {
73 i++;
74 }
75 }
76 }
77
78 boolean forWithNestedIfWhichReturns(int valueToSearch, int... values) {
79 for (int value : values) {
80 if (value == valueToSearch) {
81 return true;
82 }
83 }
84
85 return false;
86 }
87 }