To merage two array

Question

Dear all
class IntArray {
private int data[];
public IntArray (int d[]) {
data=d;
How to merge two array with method:
public IntArray merge(IntArray b)
I try to find out the length of IntArray with b.length but unsucced.

Answer 1

Does this help?
public class FileMerge {
public static void main(String args[]){
   int []File1 = {3, 7, 8, 11, 15};
   System.out.println();
   System.out.print("File 1 is "+File1.length+":");
      for (int i=0; i <File1.length; i++) System.out.print(" "+File1[ i ]);
   int []File2 = {2, 6, 8, 12};
   System.out.println();
   System.out.print("File 2 is "+File2.length+":");
      for (int i=0; i <File2.length; i++) System.out.print(" "+File2[ i ]);
// merge one from one file then one from the other
   int j = 0;
   int []File3 = new int[File1.length + File2.length];
      for (int i=0; i <File3.length; i++){
         if(i < File2.length) File3[j++]=File2[ i ];
         if(i < File1.length) File3[j++]=File1[ i ];
   System.out.println();
   System.out.print("File 3 is "+File3.length+":");
      for (int i=0; i <File3.length; i++) System.out.print(" "+File3[ i ]);
// merge all of File1 then all of File2 after this
      for (int i=0; i <File1.length; i++){
          File3[i] = File1;
for (int i=0; i <File2.length; i++){
File3[File2.length+i+1] = File2[i];
System.out.println();
System.out.print("File 3 is "+File3.length+":");
for (int i=0; i <File3.length; i++) System.out.print(" "+File3[ i ]);
// sort it with built in function
java.util.Arrays.sort(File3);
System.out.println();
System.out.print("File 3 sorted is "+File3.length+":");
for (int i=0; i <File3.length; i++) System.out.print(" "+File3[ i ]);
// re-merge
j = 0;
File3 = new int[File1.length + File2.length];
for (int i=0; i <File3.length; i++){
if(i < File2.length) File3[j++]=File2[ i ];
if(i < File1.length) File3[j++]=File1[ i ];
// bubble sort it
for(int i=0; i <File3.length-1; i++) {
for(j=i+1; j <File3.length; j++) {
if(File3[i] < File3[j]){
int temp = File3[i];
File3[i] = File3[j];
File3[j] = temp;
} // and print it
System.out.println();
System.out.print("File 3 reverse sorted is "+File3.length+":");
for (int i=0; i <File3.length; i++) System.out.print(" "+File3[ i ]);
} // main
} // end class