I have this little script that gets information from an excel file. After I've collected the information that i need i want to combine these two arrays into one. Is that possible?
public Object[][] createData1() throws Exception {
Object[][] retObjArr1 = data.getTableArray("C:\\Users\\OAH\\Workspaces\\Chrome2\\Testdata2.xls", "Sheet1", "normalCustomer");
Object[][] retObjArr2 = data.getTableArray("C:\\Users\\OAH\\Workspaces\\Chrome2\\Testdata2.xls", "Sheet2", "langLogin");
return(retObjArrCombined); //I want to return one array with both arrays
}
You can use the System.arraycopy
method (yes, all lowercase). Javadoc . You can do more stuff with arrays using the java.util.Arrays
class.
How about this?
Link to Another Stack Question!!!!!!
public static int[][] append(int[][] a, int[][] b) {
int[][] result = new int[a.length + b.length][];
System.arraycopy(a, 0, result, 0, a.length);
System.arraycopy(b, 0, result, a.length, b.length);
return result;
}
Here is simple solution:
private static Object[] concatenate(Object[] a, Object[] b) {
Collection<Object> result = new ArrayList<Object>(a.length + b.length);
for (Object val : a) {
result.add(val);
}
for (Object val : b) {
result.add(val);
}
return result.toArray();
}
Another way:
Object[][] one = {{1, 2, 3}, {4, 5}, {6}};
Object[][] two = {{7, 8}, {9}};
List<Object[]> holder = new ArrayList<>();
Collections.addAll(holder, one);
Collections.addAll(holder, two);
Object[][] result = holder.toArray(new Object[holder.size()][]);
The following code achieves your task :
Object[][] retObjArr1 = { { "a00", "a01" }, { "a10", "a11" },
{ "a20", "a21" } };
Object[][] retObjArr2 = { { "b00", "b01" }, { "b10", "b11" },
{ "b20", "b21" } };
List<Object[][]> list = new ArrayList<Object[][]>();
list.add(retObjArr1);
list.add(retObjArr2);
int totalRow = 0;
for (int all = 0; all < list.size(); all++) {
totalRow += list.get(all).length;
}
Object[][] retObjArrCombined = new Object[totalRow][];
int rowCount = 0;
for (int all = 0; all < list.size(); all++) {
Object[][] objects = list.get(all);
for (int i = 0; i < objects.length; i++) {
retObjArrCombined[rowCount] = objects[i];
rowCount++;
}
}
for (int i = 0; i < retObjArrCombined.length; i++) {
for (int j = 0; j < retObjArrCombined[i].length; j++) {
System.out.println("value at :(" + i + "," + j + ") is:"
+ retObjArrCombined[i][j]);
}
}
In this code, the Object[][] retObjArrCombined
contains all arrays copied from retObjArr1
, retObjArr2
etc... And it prints the following output :
value at :(0,0) is:a00
value at :(0,1) is:a01
value at :(1,0) is:a10
value at :(1,1) is:a11
value at :(2,0) is:a20
value at :(2,1) is:a21
value at :(3,0) is:b00
value at :(3,1) is:b01
value at :(4,0) is:b10
value at :(4,1) is:b11
value at :(5,0) is:b20
value at :(5,1) is:b21
one-liner with streams without computation pull ups
and yes it will be a few ms slower
Object[][] combi = Stream.concat( Arrays.stream( retObjArr1 ), Arrays.stream( retObjArr2 ) ).toArray( Object[][]::new );
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