Java中的 RuleBasedCollator getCollationKey() 方法与示例

Java.text.RuleBasedCollator 类的getCollationKey ()方法用于获取从传入的字符串转换而来的一系列位。
句法：

public CollationKey getCollationKey(String source)

参数：此方法接受字符串对象作为参数。
返回值：此方法返回从传递给它的字符串转换而来的一系列位。
以下是说明getCollationKey()方法的示例：
示例 1：

Java

// Java program to demonstrate
// getCollationKey() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b < c < d";
 
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
 
            // getting series of bits
            // using getCollationKey() method
            CollationKey key
                = col.getCollationKey("Geek");
 
            // display result
            System.out.println(
                "Series of bits are :- "
                + key.getSourceString());
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

Series of bits are :- Geek

示例 2：

Java

// Java program to demonstrate
// getCollationKey() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b < c < d";
 
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
 
            // getting series of bits
            // using getCollationKey() method
            CollationKey key
                = col.getCollationKey("G_f_G");
 
            // display result
            System.out.println(
                "Series of bits are :- "
                + key.getSourceString());
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

Series of bits are :- G_f_G

参考： https://docs.oracle.com/javase/9/docs/api/ Java/text/RuleBasedCollator.html#getCollationKey-java.lang.String-