/
CloseToOne.java
45 lines (38 loc) · 1.5 KB
/
CloseToOne.java
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
/*
* Copyright (C) 2000-2013 Heinz Max Kabutz
*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership. Heinz Max Kabutz licenses
* this file to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package eu.javaspecialists.tjsn.examples.issue198;
/**
* Demo class from http://www.javaspecialists.eu/archive/Issue198.html
*
* @author Dr Heinz M. Kabutz
*/
public class CloseToOne {
public static double makeDouble(long first, long second) {
return ((first << 27) + second) / (double) (1L << 53);
}
public static void main(String[] args) {
long first = (1 << 26) - 1;
long second = (1 << 27) - 1;
System.out.println(makeDouble(first, second));
System.out.println((int) (makeDouble(first, second) + 1));
second--;
System.out.println(makeDouble(first, second));
System.out.println((int) (makeDouble(first, second) + 1));
System.out.println((((1L << 53) - 1)) / (double) (1L << 53));
}
}