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Java Collections - Arrays.copyOfRange() Examples

Java Collections Java Java API 

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Class:

java.util.Arrays

java.lang.Objectjava.lang.Objectjava.util.Arraysjava.util.ArraysLogicBig

Methods:

These methods copy the specified range of the specified array into a new array. 

public static <T> T[] copyOfRange(T[] original,
                                  int from,
                                  int to)

public static <T,U> T[] copyOfRange(U[] original,
                                    int from,
                                    int to,
                                    Class<? extends T[]> newType)

public static byte[] copyOfRange(byte[] original,
                                 int from,
                                 int to)

public static short[] copyOfRange(short[] original,
                                  int from,
                                  int to)

public static int[] copyOfRange(int[] original,
                                int from,
                                int to)

public static long[] copyOfRange(long[] original,
                                 int from,
                                 int to)

public static char[] copyOfRange(char[] original,
                                 int from,
                                 int to)

public static float[] copyOfRange(float[] original,
                                  int from,
                                  int to)

public static double[] copyOfRange(double[] original,
                                   int from,
                                   int to)

public static boolean[] copyOfRange(boolean[] original,
                                    int from,
                                    int to)

Examples


package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample {

    public static void main(String... args) {
        boolean[] arr = {true, false, true, true, false};
        System.out.println(Arrays.toString(arr));

        boolean[] arr2 = Arrays.copyOfRange(arr, 2, 5);
        System.out.println(Arrays.toString(arr2));

    }
}

Output

[true, false, true, true, false]
[true, true, false]




package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample2 {

    public static void main(String... args) {
        int[] arr = {1, 3, 2, 5, 6, 7, 9};

        int[] arr2 = Arrays.copyOfRange(arr, 2, 4);
        System.out.println(Arrays.toString(arr2));
    }
}

Output

[2, 5]




package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample3 {

    public static void main(String... args) {
        int[] arr = {1, 3, 2, 5, 6, 7, 9};

        int[] arr2 = Arrays.copyOfRange(arr, 2, 2);
        System.out.println(Arrays.toString(arr2));
    }
}

Output

[]




package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample4 {

    public static void main(String... args) {
        int[] arr = {1, 3, 2, 5, 6, 7, 9};

        int[] arr2 = Arrays.copyOfRange(arr, 2, 1);
        System.out.println(Arrays.toString(arr2));
    }
}

Output

Caused by: java.lang.IllegalArgumentException: 2 > 1
	at java.util.Arrays.copyOfRange(Arrays.java:3591)
	at com.logicbig.example.arrays.CopyOfRangeExample4.main(CopyOfRangeExample4.java:15)
	... 6 more

package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample5 {

    public static void main(String... args) {
        Integer[] arr = {1, 3, 2, 5, 6, 7, 9};

        Integer[] arr2 = Arrays.copyOfRange(arr, 4, 6);
        System.out.println(Arrays.toString(arr2));
    }
}

Output

[6, 7]




package com.logicbig.example.arrays;

import java.util.Arrays;

public class CopyOfRangeExample6 {

    public static void main(String... args) {
        Integer[] arr = {1, 3, 2, 5, 6, 7, 9};

        Number[] arr2 = Arrays.copyOfRange(arr, 4, 6, Number[].class);
        System.out.println(Arrays.toString(arr2));
    }
}

Output

[6, 7]

See Also