Array sort
In this chapter you will learn:
- How to sort an array
- Sort string type array in case insensitive order and case sensitive order
- Sort an Array in Descending (Reverse) Order
Sort an array
The following methods sort the specified array into ascending numerical order.
static void sort(byte[] a)static void sort(byte[] a, int fromIndex, int toIndex)static void sort(char[] a)static void sort(char[] a, int fromIndex, int toIndex)static void sort(double[] a)static void sort(double[] a, int fromIndex, int toIndex)static void sort(float[] a)static void sort(float[] a, int fromIndex, int toIndex)static void sort(int[] a)static void sort(int[] a, int fromIndex, int toIndex)static void sort(long[] a)static void sort(long[] a, int fromIndex, int toIndex)static void sort(Object[] a)static void sort(Object[] a, int fromIndex, int toIndex)static void sort(short[] a)static void sort(short[] a, int fromIndex, int toIndex)static<T> void sort(T[] a, Comparator<? super T> c)static<T> void sort(T[] a, int fromIndex, int toIndex, Comparator<? super T> c)
import java.util.Arrays;
/*from j a v a 2 s.com*/
public class Main{
public static void main(String args[]) {
int array[] = new int[10];
for (int i = 0; i < 10; i++){
array[i] = -3 * i;
}
System.out.print("Original contents: ");
System.out.println(Arrays.toString(array));
Arrays.sort(array);
System.out.print("Sorted: ");
System.out.println(Arrays.toString(array));
}
}
The output:
Sort string type array in case insensitive order and case sensitive order
import java.util.Arrays;
/*from j ava2s . c o m*/
public class Main {
public static void main(String[] args) {
String[] teams = new String[5];
teams[0] = "M";
teams[1] = "c";
teams[2] = "A";
teams[3] = "l";
teams[4] = "E";
Arrays.sort(teams);
System.out.println(Arrays.toString(teams));
Arrays.sort(teams, String.CASE_INSENSITIVE_ORDER);
System.out.println(Arrays.toString(teams));
Arrays.sort(teams);
System.out.println(Arrays.toString(teams));
}
}
The code above generates the following result.
Sort an Array in Descending (Reverse) Order
import java.util.Arrays;
import java.util.Collections;
//from j a va 2s . com
public class Main {
public static void main(String[] args) {
Integer[] arrayToSort = new Integer[] {
new Integer(5),
new Integer(89),
new Integer(16),
new Integer(2)
};
Arrays.sort(arrayToSort, Collections.reverseOrder());
for (Integer i : arrayToSort) {
System.out.println(i.intValue());
}
}
}
Output:
Next chapter...
What you will learn in the next chapter:
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