Java URI getHost()方法及示例

getHost()函数是URI类的一部分。函数getHost()返回指定URI的主机。
URL的Host部分是URI的主机名称。

函数签名:

public String getHost()

返回类型 该函数返回字符串类型

语法

url.getHost()

参数 ：该函数不需要任何参数

下面的程序将说明getHost()函数的使用 。

例1 :

// Java program to show the 
// use of the function getHost()
  
import java.net.*;
class Solution {
public static void main(String args[])
    {
        // URI  object
        URI uri = null;
  
        try {
            // create a URI
            uri = new URI("https://www.geeksforgeeks.org");
  
            // get the Host
            String host = uri.getHost();
  
            // display the URI
            System.out.println("URI = " + uri);
  
            // display the Host
            System.out.println("Host = " + host);
        }
        // if any error occurs
        catch (URISyntaxException e) {
            // display the error
            System.out.println("URI Exception =" + e.getMessage());
        }
    }
}

输出:

URI = https://www.geeksforgeeks.org
Host = www.geeksforgeeks.org

例2： getAuthority()和getHost()函数的区别在于，getAuthority()返回主机和端口，而getHost()只返回主机名。

// Java program to show the 
// use of the function getHost()
  
import java.net.*;
  
class Solution {
    public static void main(String args[])
    {
        // url  object
        URI uri = null;
  
        try {
            // create a URI
            uri = new URI("https://www.geeksforgeeks.org:80");
  
            // get the Authority
            String authority = uri.getAuthority();
  
            // get the Host
            String host = uri.getHost();
  
            // display the URI
            System.out.println("URI = " + uri);
  
            // display the Authority
            System.out.println("Authority = " + authority);
  
            // display the Host
            System.out.println("Host = " + host);
        }
        // if any error occurs
        catch (URISyntaxException e) {
            // display the error
            System.out.println("URI Exception =" + e.getMessage());
        }
    }
}

输出:

URI = https://www.geeksforgeeks.org:80
Authority = www.geeksforgeeks.org:80
Host = www.geeksforgeeks.org