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Compare BigDecimal movePointRight and scaleByPowerOfTen in Java
The java.math.BigDecimal.movePointRight(int n) returns a BigDecimal which is equivalent to this one with the decimal point moved n places to the right. If n is non-negative, the call merely subtracts n from the scale.
The java.math.BigDecimal.scaleByPowerOfTen(int n) returns a BigDecimal whose numerical value is equal to (this * 10n). The scale of the result is (this.scale() - n).
The following is an example displaying the usage of both −
Example
import java.math.BigDecimal;
public class Demo {
public static void main(String... args) {
long base = 3676;
int scale = 5;
BigDecimal d = BigDecimal.valueOf(base, scale);
System.out.println("Value = "+d);
System.out.println("
Demonstrating moveRight()...");
BigDecimal moveRight = d.movePointRight(12);
System.out.println("Result = "+moveRight);
System.out.println("Scale = " + moveRight.scale());
System.out.println("
Demonstrating scaleByPowerOfTen()...");
BigDecimal scaleRes = d.scaleByPowerOfTen(12);
System.out.println("Result = "+scaleRes);
System.out.println("Scale = " + scaleRes.scale());
}
}Output
Value = 0.03676 Demonstrating moveRight()... Result = 36760000000 Scale = 0 Demonstrating scaleByPowerOfTen()... Result = 3.676E+10 Scale = -7
In the above program, first we worked on movePointRight −
long base = 3676;
int scale = 5;
BigDecimal d = BigDecimal.valueOf(base, scale);
System.out.println("Value = "+d);
System.out.println("
Demonstrating moveRight()...");
BigDecimal moveRight = d.movePointRight(12);
System.out.println("Result = "+moveRight);
System.out.println("Scale = " + moveRight.scale());Then we implemented scaleByPowerOfTen −
long base = 3676;
int scale = 5;
BigDecimal d = BigDecimal.valueOf(base, scale);
System.out.println("Value = "+d);
System.out.println("
Demonstrating scaleByPowerOfTen()...");
BigDecimal scaleRes = d.scaleByPowerOfTen(12);
System.out.println("Result = "+scaleRes);
System.out.println("Scale = " + scaleRes.scale());
Updated on: 30-Jul-2019
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