BigDecimal类compareTo()方法 (BigDecimal Class compareTo() method)

compareTo() method is available in java.math package.

compareTo()方法在java.math包中可用。

compareTo() method is used to compare this BigDecimal object to the given object or in other words we can say this method compares two objects of “BigDecimal” type and when both the objects are same in value but different in terms of the scale then it is treated to be equal.

compareTo()方法用于将此BigDecimal对象与给定对象进行比较,或者换句话说,我们可以说此方法比较两个“ BigDecimal”类型的对象,并且当两个对象的值相同但比例不同时,则它被视为相等。

compareTo() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

compareTo()方法是一种非静态方法,只能通过类对象访问,如果尝试使用类名称访问该方法,则会收到错误消息。

compareTo() method does not throw an exception at the time of comparing.

compareTo()方法在比较时不会引发异常。

Syntax:

句法:

    public int compareTo(BigDecimal ob);

Parameter(s):

参数:

BigDecimal ob – represents the object to be compared to this BigDecimal object.

BigDecimal ob –表示要与此BigDecimal对象进行比较的对象。

Return value:

返回值:

The return type of this method is int, it may return anyone of the given values,

此方法的返回类型为int ,它可以返回任何给定值,

When (this BigDecimal) == (BigDecimal ob), it returns 0.

当(this BigDecimal)==(BigDecimal ob)时,它返回0。

When (this BigDecimal) < (BigDecimal ob), it returns -1.

当(this BigDecimal)<(BigDecimal ob)时,它返回-1。

When (this BigDecimal) > (BigDecimal ob), it returns 1.

当(this BigDecimal)>(BigDecimal ob)时,返回1。

Example:

例:

// Java program to demonstrate the example 
// of int compareTo() method of BigDecimal
 
import java.math.*;
 
public class CompareToOfBD {
    public static void main(String args[]) {
        // Initialize two variables of int and 
        // String type
 
        int val = 125;
        String str = "100";
 
        // Initialize two BigDecimal objects  
        BigDecimal b_dec1 = new BigDecimal(val);
        BigDecimal b_dec2 = new BigDecimal(str);
 
        // By using compareTo() method is to 
        // compare this BigDecimal (b_dec1) to the
        // given BigDecimal (b_dec1) if both are same
        // then it returns 0
        int compare = b_dec1.compareTo(b_dec1);
        System.out.println("b_dec1.compareTo(b_dec1): " + compare);
 
        // By using compareTo() method is to 
        // compare this BigDecimal (b_dec1) to the
        // given BigDecimal (b_dec2) it returns 1 because
        // this BigDecimal (b_dec1) > BigDecimal (b_dec2)
        compare = b_dec1.compareTo(b_dec2);
        System.out.println("b_dec1.compareTo(b_dec2): " + compare);
    }
}

Output

输出量

b_dec1.compareTo(b_dec1): 0

b_dec1.compareTo(b_dec2): 1



翻译自: https://www.includehelp.com/java/bigdecimal-compareto-method-with-example.aspx


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