BigDecimal类的equals()方法 (BigDecimal Class equals() method)

• equals() method is available in java.math package.

  equals()方法在java.math包中可用。

• equals() method is used to check whether this BigDecimal and the given object are equal or not and the two objects are equal when both the objects hold the same value and scale.

  equals()方法用于检查BigDecimal和给定对象是否相等，并且当两个对象都具有相同的值和小数位数时，两个对象是否相等。

• equals() 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.

  equals()方法是一种非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

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

  equals()方法在比较时不会引发异常。

Syntax:

句法：

    public boolean equals(Object ob);

Parameter(s):

参数：

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

  对象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 boolean, it returns true when both objects are of "BigDecimal" type and both holds the same value and scale otherwise it returns false.

此方法的返回类型为boolean ，当两个对象均为“ BigDecimal”类型并且都具有相同的值和小数位数时，它返回true ，否则返回false 。

Example:

例：

// Java program to demonstrate the example 
// of boolean equals(Object ob) method of BigDecimal

import java.math.*;

public class EqualsOfBD {
    public static void main(String args[]) {
        // Initialize two variables first is
        // of "double" and second is of "String"
        // type
        double d = 587.0;
        String str = "587.00";

        // Initialize two BigDecimal objects  
        BigDecimal b_dec1 = new BigDecimal(d);
        BigDecimal b_dec2 = new BigDecimal(str);


        // By using equals() method, we are comparing
        // this BigDecimal (b_dec1) to the given
        // BigDecimal b_dec2 and here it returns
        // false because they are equal in value
        // but not in terms of scale
        boolean compare = b_dec1.equals(b_dec2);
        System.out.println("b_dec1.equals(b_dec2): " + compare);

        // By using equals() method, we are comparing
        // this BigDecimal (b_dec1) to the given
        // BigDecimal b_dec2 and here it returns
        // true because they both are equal in value
        // and scale
        compare = b_dec1.equals(b_dec1);
        System.out.println("b_dec1.equals(b_dec1): " + compare);
    }
}

Output

输出量

b_dec1.equals(b_dec2): false
b_dec1.equals(b_dec1): true

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