练习java文档Locale.LanguageRange

Locale.LanguageRange（不是枚举类）
变量
MAX_WEIGHT
MIN_WEIGHT
方法
equals() 当语言范围一致的时候返回。
getRange()
getWeight()
hashCode()
mapEquivalents()看不懂，不知道怎么用
两个parse()看不懂，不知道怎么用
toString()

不理解这句话

import java.util.*;
import java.io.*;
import static java.util.Locale.*;
public class Test
{
	public static void main(String[] args) throws Exception,Throwable
	{
		//Locale.LanguageRange
		//变量
		System.out.println(LanguageRange.MAX_WEIGHT);
		System.out.println(LanguageRange.MIN_WEIGHT);

		LanguageRange range =new LanguageRange("*-CN");
		LanguageRange range2 = new LanguageRange("*-US");
		System.out.println(range.equals(range2));
		System.out.println(range.getRange());
		System.out.println(range2.getRange());

		System.out.println(range.getWeight());
		System.out.println(range2.getWeight());

		System.out.println(range.hashCode());
		System.out.println(range2.hashCode());

		System.out.println(range.toString());
		System.out.println(range2.toString());

		System.out.println(LanguageRange.parse("*-CN"));

		Map> map = new HashMap<>();
		map.put("zh",new ArrayList(Arrays.asList(new String[] {"zh"})));
		System.out.println(LanguageRange.mapEquivalents(LanguageRange.parse("*-CN"),map ));

		
	}	
}