how to add two map values in java
//map 1
HashMap<Integer, String> map1 = new HashMap<>();
map1.put(1, "A");
map1.put(2, "B");
map1.put(3, "C");
map1.put(5, "E");
//map 2
HashMap<Integer, String> map2 = new HashMap<>();
map2.put(1, "G"); //It will replace the value 'A'
map2.put(2, "B");
map2.put(3, "C");
map2.put(4, "D"); //A new pair to be added
//Merge maps
map1.putAll(map2);
System.out.println(map1);how to write a merge sort array method ni java
public static void mergeSort(int[] a, int n) {
if (n < 2) {
return;
}
int mid = n / 2;
int[] l = new int[mid];
int[] r = new int[n - mid];
for (int i = 0; i < mid; i++) {
l[i] = a[i];
}
for (int i = mid; i < n; i++) {
r[i - mid] = a[i];
}
mergeSort(l, mid);
mergeSort(r, n - mid);
merge(a, l, r, mid, n - mid);
}how to write a merge sort array method ni java
public static void merge(
int[] a, int[] l, int[] r, int left, int right) {
int i = 0, j = 0, k = 0;
while (i < left && j < right) {
if (l[i] <= r[j]) {
a[k++] = l[i++];
}
else {
a[k++] = r[j++];
}
}
while (i < left) {
a[k++] = l[i++];
}
while (j < right) {
a[k++] = r[j++];
}
}Copyright © 2021 Codeinu
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