How to convert Double type to integer using intValue() method of Double class

How to use the intValue() method of the Double class to convert the Double type to an integer

In Java programming, we often encounter the need to convert the Double type to an integer. The Double class provides a very convenient method intValue(), which can convert the Double type into an integer. Below we will introduce how to use the intValue() method to achieve this conversion.

First, we need to create a Double object, and then call its intValue() method to get the value in integer form. The code example is as follows:

Double number = 3.14159;
int integer = number.intValue();
System.out.println("转换后的整数值为：" + integer);

In the above code, we created a Double object with a value of 3.14159. Then call the intValue() method to convert it to an integer and assign the result to the integer variable. Finally, we use the System.out.println() method to print out the converted integer value.

Execute the above code and the following results will be output:

转换后的整数值为：3

As can be seen from the output results, the intValue() method converts the Double type value into an integer and omits the decimal part. Moreover, notice that the intValue() method returns a value of type int, so when receiving the converted result, use an int type variable to store it.

In addition to the intValue() method, the Double class also provides several other similar methods for type conversion. For example, the doubleValue() method can convert the Double type to the double type, and the longValue() method can convert the Double type to the long type.

It should be noted that when the value of a Double object exceeds the integer range, the conversion result may overflow or lose precision. Therefore, when performing type conversion, judgment and processing need to be made based on specific business needs.

In summary, through the intValue() method of the Double class, we can easily convert the Double type to an integer. In actual programming, if there is a scenario where you need to convert the Double type into an integer, you can use the intValue() method to achieve this.

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