Java
int[] a = new int[5];
int[] b = {1, 2, 3};
int[] c = new int[]{1, 2, 3};
String[] names = new String[3];
boolean[] seen = new boolean[n];
char[] chars = new char[26];
a.length;
int[][] grid = new int[rows][cols];
int[][] g2 = {{1, 2}, {3, 4}};
int[][] jag = new int[3][];
jag[0] = new int[2];
grid.length; grid[0].length;
int[][] dirs4 = {{0,1},{1,0},{0,-1},{-1,0}};
int[][] dirs8 = {{0,1},{1,0},{0,-1},{-1,0},{1,1},{1,-1},{-1,1},{-1,-1}};
for (int[] d : dirs4) { int nr = r + d[0], nc = c + d[1]; }
Java
Arrays.sort(a);
Arrays.sort(a, from, to);
Arrays.sort(objArr, (x, y) -> y - x);
Arrays.sort(intervals, (x, y) -> Integer.compare(x[0], y[0]));
Arrays.sort(intervals, Comparator.comparingInt(x -> x[0]));
Arrays.fill(a, -1);
for (int[] row : grid) Arrays.fill(row, -1);
Arrays.toString(a);
Arrays.deepToString(grid);
Arrays.equals(a, b);
Arrays.deepEquals(g1, g2);
Arrays.copyOf(a, newLen);
Arrays.copyOfRange(a, from, to);
a.clone();
Arrays.binarySearch(a, key);
Arrays.asList(1, 2, 3);
Arrays.stream(a).sum();
Arrays.stream(a).max().getAsInt();
Arrays.hashCode(a);
System.arraycopy(src, srcPos, dest, destPos, len);
List<Integer> list = Arrays.stream(a).boxed().collect(Collectors.toList());
int[] arr = list.stream().mapToInt(Integer::intValue).toArray();
List<String> sl = new ArrayList<>(Arrays.asList(strArr));
String[] sa = sl.toArray(new String[0]);