OnJava8-Examples/onjava/Count.java at master · BruceEckel/OnJava8-Examples · GitHub

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// onjava/Count.java

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

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

// Generate incremental values of different types

package onjava;

import java.util.*;

import java.util.function.*;

import static onjava.ConvertTo.*;

public interface Count {

class Boolean

implements Supplier<java.lang.Boolean> {

private boolean b = true;

@Override public java.lang.Boolean get() {

b = !b;

return java.lang.Boolean.valueOf(b);

}

public java.lang.Boolean get(int n) {

return get();

}

public java.lang.Boolean[] array(int sz) {

java.lang.Boolean[] result =

new java.lang.Boolean[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pboolean {

private boolean b = true;

public boolean get() {

b = !b;

return b;

}

public boolean get(int n) { return get(); }

public boolean[] array(int sz) {

return primitive(new Boolean().array(sz));

}

class Byte

implements Supplier<java.lang.Byte> {

private byte b;

@Override

public java.lang.Byte get() { return b++; }

public java.lang.Byte get(int n) {

return get();

}

public java.lang.Byte[] array(int sz) {

java.lang.Byte[] result =

new java.lang.Byte[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pbyte {

private byte b;

public byte get() { return b++; }

public byte get(int n) { return get(); }

public byte[] array(int sz) {

return primitive(new Byte().array(sz));

}

char[] CHARS =

"abcdefghijklmnopqrstuvwxyz".toCharArray();

class Character

implements Supplier<java.lang.Character> {

private int i;

@Override public java.lang.Character get() {

i = (i + 1) % CHARS.length;

return CHARS[i];

}

public java.lang.Character get(int n) {

return get();

}

public java.lang.Character[] array(int sz) {

java.lang.Character[] result =

new java.lang.Character[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pchar {

private int i;

public char get() {

i = (i + 1) % CHARS.length;

return CHARS[i];

}

public char get(int n) { return get(); }

public char[] array(int sz) {

return primitive(new Character().array(sz));

}

class Short

implements Supplier<java.lang.Short> {

short s;

@Override

public java.lang.Short get() { return s++; }

public java.lang.Short get(int n) {

return get();

}

public java.lang.Short[] array(int sz) {

java.lang.Short[] result =

new java.lang.Short[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pshort {

short s;

public short get() { return s++; }

public short get(int n) { return get(); }

public short[] array(int sz) {

return primitive(new Short().array(sz));

}

class Integer

implements Supplier<java.lang.Integer> {

int i;

@Override

public java.lang.Integer get() { return i++; }

public java.lang.Integer get(int n) {

return get();

}

public java.lang.Integer[] array(int sz) {

java.lang.Integer[] result =

new java.lang.Integer[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pint implements IntSupplier {

int i;

public int get() { return i++; }

public int get(int n) { return get(); }

@Override

public int getAsInt() { return get(); }

public int[] array(int sz) {

return primitive(new Integer().array(sz));

}

class Long

implements Supplier<java.lang.Long> {

private long l;

@Override

public java.lang.Long get() { return l++; }

public java.lang.Long get(int n) {

return get();

}

public java.lang.Long[] array(int sz) {

java.lang.Long[] result =

new java.lang.Long[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Plong implements LongSupplier {

private long l;

public long get() { return l++; }

public long get(int n) { return get(); }

@Override

public long getAsLong() { return get(); }

public long[] array(int sz) {

return primitive(new Long().array(sz));

}

class Float

implements Supplier<java.lang.Float> {

private int i;

@Override public java.lang.Float get() {

return java.lang.Float.valueOf(i++);

}

public java.lang.Float get(int n) {

return get();

}

public java.lang.Float[] array(int sz) {

java.lang.Float[] result =

new java.lang.Float[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pfloat {

private int i;

public float get() { return i++; }

public float get(int n) { return get(); }

public float[] array(int sz) {

return primitive(new Float().array(sz));

}

class Double

implements Supplier<java.lang.Double> {

private int i;

@Override public java.lang.Double get() {

return java.lang.Double.valueOf(i++);

}

public java.lang.Double get(int n) {

return get();

}

public java.lang.Double[] array(int sz) {

java.lang.Double[] result =

new java.lang.Double[sz];

Arrays.setAll(result, n -> get());

return result;

}

class Pdouble implements DoubleSupplier {

private int i;

public double get() { return i++; }

public double get(int n) { return get(); }

@Override

public double getAsDouble() { return get(0); }

public double[] array(int sz) {

return primitive(new Double().array(sz));

}

OnJava8-Examples/onjava/Count.java at master · BruceEckel/OnJava8-Examples · GitHub

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