用示例将 hashCode()方法打包到 Java 中
原文:https://www . geesforgeks . org/package-hashcode-method-in-Java-with-examples/
java.lang.Package 类 的 hashCode() 方法用来获取这个包实例的 hashCode 值。方法以整数值的形式返回哈希值。
语法:
public int hashCode()
参数:该方法不接受任何参数。
返回值:该方法将哈希值作为整数值返回。
下面的程序演示了 hashCode()方法。
例 1:
// Java program to demonstrate
// hashCode() method
public class Test {
public static void main(String[] args)
{
// returns the Package
// object for this package
Package myPackage
= Package.getPackage("java.lang");
System.out.println(
"Package represented by myPackage: "
+ myPackage.toString());
// get the hashCode value of this package
// using hashCode() method
System.out.println(
"hashCode value: "
+ myPackage.hashCode());
}
}
输出:
Package represented by myPackage: package java.lang, Java Platform API Specification, version 1.8
hashCode value: -888658374
例 2:
// Java program to demonstrate
// hashCode() method
public class Test {
public static void main(String[] args)
{
// returns the Package
// object for this package
Package myPackage
= Package.getPackage("java.io");
System.out.println(
"Package represented by myPackage: "
+ myPackage.toString());
// get the hashCode value of this package
// using hashCode() method
System.out.println(
"hashCode value: "
+ myPackage.hashCode());
}
}
输出:
Package represented by myPackage: package java.io, Java Platform API Specification, version 1.8
hashCode value: -1819917198
参考:https://docs . Oracle . com/javase/9/docs/API/Java/lang/package . html # hashCode–
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