Java 中的 Currency getInstance()方法，带示例

原文:https://www . geesforgeks . org/currency-getinstance-method-in-Java-with-examples/

Java 中 Currency 类的 getInstance() 方法用于检索给定货币代码的该货币的实例。 语法:

CURRENCY.getInstance(String currency_code)

参数:该方法接受一个参数货币 _ 代码，该参数是特定货币的货币。 返回值:此方法返回货币代码的货币实例。 异常:如果调用了无效代码，该方法将抛出运行时错误。 下面的程序说明了 getInstance()方法的工作: 程序 1:

Java 语言(一种计算机语言，尤用于创建网站)

// Java Code to illustrate getInstance() method

import java.util.*;

public class Currency_Demo {
    public static void main(String[] args)
    {

        // Creating a currency with the code
        Currency curr_ency
            = Currency.getInstance("INR");

        // Getting the currency code
        System.out.println("Currency Code of India is: "
                           + curr_ency.toString());
    }
}

Output: 

Currency Code of India is: INR

节目 2:

Java 语言(一种计算机语言，尤用于创建网站)

// Java Code to illustrate toString() method

import java.util.*;

public class Currency_Demo {
    public static void main(String[] args)
    {

        // Creating a currency with the code
        Currency curr_ency
            = Currency.getInstance("USD");

        // Getting the currency code
        System.out.println("Currency Code of USA is: "
                           + curr_ency.toString());
    }
}

Output: 

Currency Code of USA is: USD

程序 3: 为无效的货币代码。

Java 语言(一种计算机语言，尤用于创建网站)

// Java Code to illustrate getInstance() method

import java.util.*;

public class Currency_Demo {
    public static void main(String[] args)
    {
        try {

            // Creating a currency with the code
            Currency curr_ency
                = Currency.getInstance("USDA");

            // Getting the currency code
            String currency_code
                = curr_ency.toString();
            System.out.println("Invalid Currency Code: "
                               + currency_code);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output: 

java.lang.IllegalArgumentException

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