Repository navigation
Expand file tree
/
Copy pathRand.java
More file actions
315 lines (256 loc) · 7.93 KB
/
Copy pathRand.java
File metadata and controls
315 lines (256 loc) · 7.93 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
// onjava/Rand.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.
// Generate random values of different types
package onjava;
import java.util.Arrays;
import java.util.SplittableRandom;
import java.util.function.DoubleSupplier;
import java.util.function.IntSupplier;
import java.util.function.LongSupplier;
import java.util.function.Supplier;
import static onjava.ConvertTo.primitive;
public interface Rand {
int MOD = 10_000;
static double trim(double d) {
return
((double) Math.round(d * 1000.0)) / 100.0;
}
class Boolean
implements Supplier<java.lang.Boolean> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Boolean get() {
return r.nextBoolean();
}
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 {
public boolean[] array(int sz) {
return primitive(new Boolean().array(sz));
}
}
class Byte
implements Supplier<java.lang.Byte> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Byte get() {
return (byte) r.nextInt(MOD);
}
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 {
public byte[] array(int sz) {
return primitive(new Byte().array(sz));
}
}
class Character
implements Supplier<java.lang.Character> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Character get() {
return (char) r.nextInt('a', 'z' + 1);
}
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 {
public char[] array(int sz) {
return primitive(new Character().array(sz));
}
}
class Short
implements Supplier<java.lang.Short> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Short get() {
return (short) r.nextInt(MOD);
}
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 {
public short[] array(int sz) {
return primitive(new Short().array(sz));
}
}
class Integer
implements Supplier<java.lang.Integer> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Integer get() {
return r.nextInt(MOD);
}
public java.lang.Integer get(int n) {
return get();
}
public java.lang.Integer[] array(int sz) {
int[] primitive = new Pint().array(sz);
java.lang.Integer[] result =
new java.lang.Integer[sz];
for (int i = 0; i < sz; i++)
result[i] = primitive[i];
return result;
}
}
class Pint implements IntSupplier {
SplittableRandom r = new SplittableRandom(47);
@Override
public int getAsInt() {
return r.nextInt(MOD);
}
public int get(int n) {
return getAsInt();
}
public int[] array(int sz) {
return r.ints(sz, 0, MOD).toArray();
}
}
class Long
implements Supplier<java.lang.Long> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Long get() {
return r.nextLong(MOD);
}
public java.lang.Long get(int n) {
return get();
}
public java.lang.Long[] array(int sz) {
long[] primitive = new Plong().array(sz);
java.lang.Long[] result =
new java.lang.Long[sz];
for (int i = 0; i < sz; i++)
result[i] = primitive[i];
return result;
}
}
class Plong implements LongSupplier {
SplittableRandom r = new SplittableRandom(47);
@Override
public long getAsLong() {
return r.nextLong(MOD);
}
public long get(int n) {
return getAsLong();
}
public long[] array(int sz) {
return r.longs(sz, 0, MOD).toArray();
}
}
class Float
implements Supplier<java.lang.Float> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Float get() {
return (float) trim(r.nextDouble());
}
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 {
public float[] array(int sz) {
return primitive(new Float().array(sz));
}
}
class Double
implements Supplier<java.lang.Double> {
SplittableRandom r = new SplittableRandom(47);
@Override
public java.lang.Double get() {
return trim(r.nextDouble());
}
public java.lang.Double get(int n) {
return get();
}
public java.lang.Double[] array(int sz) {
double[] primitive =
new Rand.Pdouble().array(sz);
java.lang.Double[] result =
new java.lang.Double[sz];
for (int i = 0; i < sz; i++)
result[i] = primitive[i];
return result;
}
}
class Pdouble implements DoubleSupplier {
SplittableRandom r = new SplittableRandom(47);
@Override
public double getAsDouble() {
return trim(r.nextDouble());
}
public double get(int n) {
return getAsDouble();
}
public double[] array(int sz) {
double[] result = r.doubles(sz).toArray();
Arrays.setAll(result,
n -> result[n] = trim(result[n]));
return result;
}
}
class String
implements Supplier<java.lang.String> {
SplittableRandom r = new SplittableRandom(47);
private int strlen = 7; // Default length
public String() {
}
public String(int strLength) {
strlen = strLength;
}
@Override
public java.lang.String get() {
return r.ints(strlen, 'a', 'z' + 1)
.collect(StringBuilder::new,
StringBuilder::appendCodePoint,
StringBuilder::append).toString();
}
public java.lang.String get(int n) {
return get();
}
public java.lang.String[] array(int sz) {
java.lang.String[] result =
new java.lang.String[sz];
Arrays.setAll(result, n -> get());
return result;
}
}
}