java reverse method code example

Example 1: reverse array in java

int length = array.length;
		for(int i=0;i<length/2;i++) {
			int swap = array[i];
			array[i] = array[length-i-1];
			array[length-i-1] = swap;
		}
or
Collections.reverse(Arrays.asList(array));

Example 2: how to reverse a list in java

List<String> stringList = Arrays.asList("A", "B", "C");
    Collections.reverse(stringList);
    assertThat(stringList).containsExactly("C", "B", "A");

Example 3: string reverse in java

String str = "Hello";
String reverse(String str){
  StringBuilder sb = new StringBuilder();
  sb.append(str);
  sb.reverse();
  return sb.toString();
}

Example 4: reverse a string in java

As we know that String is immutable. String class do not have reverse() method.