Array.swap java

Java array swap

public static void swap(int x, int y, int[] arr) {
  	int temp = arr[x];
  	arr[x] = arr[y];
  	arr[y] = temp;
}

Array.swap java

public static final <T> void swap (T[] a, int i, int j) {
  T t = a[i];
  a[i] = a[j];
  a[j] = t;
}

public static final <T> void swap (List<T> l, int i, int j) {
  Collections.<T>swap(l, i, j);
}

private void test() {
  String [] a = {"Hello", "Goodbye"};
  swap(a, 0, 1);
  System.out.println("a:"+Arrays.toString(a));
  List<String> l = new ArrayList<String>(Arrays.asList(a));
  swap(l, 0, 1);
  System.out.println("l:"+l);
}

Source: stackoverflow.com

Similar codes

0 vote124 views1 answer
Using addition to multiply in java
Java
0 vote130 views1 answer
Java Find the greatest common divisor of two positive integers. The integers can be large, so you need to find a clever solution.
Java
4 votes162 views3 answers
Java math ceil
Java
0 vote142 views1 answer
Assert Two Lists for Equality Ignoring Order in Java
Java
1 vote133 views1 answer
Jdk path ubuntu
Java
0 vote140 views1 answer
Java.lang.NullPointerException: Attempt to invoke interface method 'boolean java.util.List.add(java.lang.Object)' on a null object reference
Java
0 vote146 views3 answers
Resttemplate get rest api call in java
Java
1 vote158 views1 answer
LocalDateTime to XMLGregorianCalendar
Java
0 vote160 views1 answer
What is a cache-less reload
Java
3 votes136 views1 answer
How to get all the names of the files in a folder in java?
Java