-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathBigIntegerDemo.java
More file actions
55 lines (41 loc) · 1.33 KB
/
Copy pathBigIntegerDemo.java
File metadata and controls
55 lines (41 loc) · 1.33 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
package com.sinllychen.string;
import java.math.*;
public class BigIntegerDemo
{
public static void testBigInteger()
{
BigInteger bi = new BigInteger("888");
BigInteger result = bi.multiply(new BigInteger("2"));//整数乘法
System.out.println(result);
result = bi.divide(new BigInteger("2"));//整数除法
System.out.println(result);
result = bi.add(new BigInteger("232"));//整数加法
System.out.println(result);
result = bi.subtract(new BigInteger("23122"));//整数减法
System.out.println(result);
result = bi.shiftRight(10);//移位
System.out.println(result);
}
public static void testBigDecimal()
{
BigDecimal bi = new BigDecimal("888.888");
BigDecimal result = bi.multiply(new BigDecimal("2.3"));//小数乘法
System.out.println(result);
result = bi.divide(new BigDecimal("90.4"), 2);//小数除法
System.out.println(result);
result = bi.add(new BigDecimal("232.34"));//小数加法
System.out.println(result);
result = bi.subtract(new BigDecimal("343.3434"));//小数减法
System.out.println(result);
}
public static void main(String[] args)
{
System.out.println("大整数整数运算：");
testBigInteger();
System.out.println("");
System.out.println("大整数小数运算：");
testBigDecimal();
String str="abcdefg";
System.out.println(str.substring(0, 4));
}
}