带有示例的Java中的 Collator getInstance() 方法

Java.text.Collator类的getInstance()方法用于获取具有当前默认语言环境的新collator 对象。

句法：

public static Collator getInstance()

参数：此方法不接受任何参数。
返回值：它提供具有当前默认语言环境的新整理器对象。

下面是说明getInstance()方法的示例：

示例 1：

Java

// Java program to demonstrate
// getInstance() 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_1
                = new RuleBasedCollator(simple);
 
            // Creating and initializing Collator Object
            // using getInstance() method
            Collator col_2 = Collator.getInstance();
 
            // display result
            if (col_1.equals(col_2))
                System.out.println(col_1
                                   + " is equal to "
                                   + col_2);
            else
                System.out.println(col_1
                                   + " is not equal to "
                                   + col_2);
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

java.text.RuleBasedCollator@5eb2e1c2 is not equal to java.text.RuleBasedCollator@289747d6

示例 2：

Java

// Java program to demonstrate
// getInstance() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing Collator Object
            Collator col_1 = Collator.getInstance();
 
            // Creating and initializing Collator Object
            Collator col_2 = Collator.getInstance();
 
            // display result
            if (col_1.equals(col_2))
                System.out.println(
                    col_1
                    + " is equal to "
                    + col_2);
            else
                System.out.println(
                    col_1
                    + " is not equal to "
                    + col_2);
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

java.text.RuleBasedCollator@289747d6 is equal to java.text.RuleBasedCollator@289747d6

参考： https://docs.oracle.com/javase/9/docs/api/ Java/text/Collator.html#getInstance–