Detailed explanation of the original type of original types
The Guava in the Java class library is the open source tool library launched by Google, which provides convenience for writing high -quality Java code.GUAVA provides a series of powerful original type processing tools that can help developers handle the original data types more efficiently.This article will introduce the original use of the original type in Guava and provide related Java code examples.
1. Introduction to the original type in Guava
The original type is the most basic data type in Java, including Boolean, Byte, Char, Short, INT, Long, Float and Double.However, the Java standard library does not provide the original type of tools that directly operates the original type, which brings inconvenience to developers.Guava provides a series of original types of tools, simplifying the operation of the original data type.
2. Use Guava to perform original type operations
(1) Use the original type tool of Guava for type conversion:
Guava provides tool methods to convert the original type into a packaging type, and to convert the packaging type into the original type.The following is a sample code using Guava for the original type conversion:
import com.google.common.primitives.Ints;
public class PrimitiveExample {
public static void main(String[] args) {
int i = 10;
Integer integerValue = Ints.tryParse("20");
System.out.println("intValue: " + Ints.compare(i, integerValue.intValue()));
}
}
(2) Use the original type tool class of Guava for sorting and comparing:
Guava provides sorting and comparative methods for the original type, which can easily sort and compare the original data.The following is a sample code that uses Guava for original types of sorting and comparison:
import com.google.common.primitives.Ints;
public class PrimitiveExample {
public static void main(String[] args) {
int[] numbers = {5, 2, 9, 1, 3};
int min = Ints.min(numbers);
int max = Ints.max(numbers);
System.out.println("Min value: " + min);
System.out.println("Max value: " + max);
}
}
(3) Use Guava's original type tool classes for array operation:
GUAVA provides a series of methods for operating the original type array, such as copy array, filling array, finding array, etc.The following is a sample code that uses Guava to operate the original type array:
import com.google.common.primitives.Ints;
public class PrimitiveExample {
public static void main(String[] args) {
int[] source = {1, 2, 3, 4, 5};
int[] target = Ints.concat(Ints.ensureCapacity(source, 10), Ints.toArray(Ints.asList(6, 7, 8)));
System.out.println("Target array: " + Ints.join(", ", target));
}
}
3. The advantages of the original type of Guava
Using the original type tool class of Guava can bring the following advantages:
(1) Simplify development: Guava provides a series of tools for original types, which can simplify the operation of developers on the original data type.
(2) Improve performance: The use of the original type for data processing can improve performance, because the overhead of automatic boxing and boxing is avoided.
(3) Provide more functions: Guava's original type tool class not only provides basic operations of the original type, but also provides more functions such as sorting, comparison, and array operations to facilitate developers for various operations.
4. Summary
This article introduces the original use of the original type of Guava and provides related Java code examples.Using Guava's original type tools can help developers handle the original data types more efficiently, simplify the development process, and provide more functions.By using Guava, developers can easily process the original type data and improve the quality and performance of code.
