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OnJava8-Examples/onjava/ConvertTo.java at master · xinan-w/OnJava8-Examples · GitHub

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// onjava/ConvertTo.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

package onjava;

public interface ConvertTo {

static boolean[] primitive(Boolean[] in) {

boolean[] result = new boolean[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i]; // Autounboxing

return result;

}

static char[] primitive(Character[] in) {

char[] result = new char[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static byte[] primitive(Byte[] in) {

byte[] result = new byte[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static short[] primitive(Short[] in) {

short[] result = new short[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static int[] primitive(Integer[] in) {

int[] result = new int[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static long[] primitive(Long[] in) {

long[] result = new long[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static float[] primitive(Float[] in) {

float[] result = new float[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static double[] primitive(Double[] in) {

double[] result = new double[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

// Convert from primitive array to wrapped array:

static Boolean[] boxed(boolean[] in) {

Boolean[] result = new Boolean[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i]; // Autoboxing

return result;

}

static Character[] boxed(char[] in) {

Character[] result = new Character[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Byte[] boxed(byte[] in) {

Byte[] result = new Byte[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Short[] boxed(short[] in) {

Short[] result = new Short[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Integer[] boxed(int[] in) {

Integer[] result = new Integer[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Long[] boxed(long[] in) {

Long[] result = new Long[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Float[] boxed(float[] in) {

Float[] result = new Float[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

static Double[] boxed(double[] in) {

Double[] result = new Double[in.length];

for(int i = 0; i < in.length; i++)

result[i] = in[i];

return result;

}

}

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