Write a java program that will accept a Biodata of user. The program produce and output by joining (concatenated) all the information into a sentence.
Answers
Answer:
Explanation:
In this program, you'll learn to concatenate two arrays in Java using arraycopy and without it.
To understand this example, you should have the knowledge of the following Java programming topics:
Java Arrays
Java for-each Loop
Example 1: Concatenate Two Arrays using arraycopy
import java.util.Arrays;
public class Concat {
public static void main(String[] args) {
int[] array1 = {1, 2, 3};
int[] array2 = {4, 5, 6};
int aLen = array1.length;
int bLen = array2.length;
int[] result = new int[aLen + bLen];
System.arraycopy(array1, 0, result, 0, aLen);
System.arraycopy(array2, 0, result, aLen, bLen);
System.out.println(Arrays.toString(result));
}
}
Output
[1, 2, 3, 4, 5, 6]
In the above program, we've two integer arrays array1 and array2.
In order to combine (concatenate) two arrays, we find its length stored in aLen and bLen respectively. Then, we create a new integer array result with length aLen + bLen.
Now, in order to combine both, we copy each element in both arrays to result by using arraycopy() function.
The arraycopy(array1, 0, result, 0, aLen) function, in simple terms, tells the program to copy array1 starting from index 0 to result from index 0 to aLen.
Likewise, for arraycopy(array2, 0, result, aLen, bLen) tells the program to copy array2 starting from index 0 to result from index aLen to bLen.
Example 2: Concatenate Two Arrays without using arraycopy
import java.util.Arrays;
public class Concat {
public static void main(String[] args) {
int[] array1 = {1, 2, 3};
int[] array2 = {4, 5, 6};
int length = array1.length + array2.length;
int[] result = new int[length];
int pos = 0;
for (int element : array1) {
result[pos] = element;
pos++;
}
for (int element : array2) {
result[pos] = element;
pos++;
}
System.out.println(Arrays.toString(result));
}
}