Java 中的排序器 getDecomposition()方法，示例

原文:https://www . geesforgeks . org/collator-get declaration-method-in-Java-with-example/

java.text.Collator 类的getdeclaration()方法用来获取这个 Collator 的分解模式。

语法:

public int getDecomposition()

参数:此方法不接受任何参数。

返回值:该方法返回该排序器的分解模式。

下面是举例说明 getDecomposition() 方法的例子:

例 1:

// Java program to demonstrate
// getDecomposition() 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);

            // setting decomposition mode
            // into the Collator object
            col.setDecomposition(
                Collator.CANONICAL_DECOMPOSITION);

            // getting decompostiton mode
            // using getDecomposition() mehtod
            int mode = col.getDecomposition();

            // display result
            if (mode == 0)
                System.out.println(
                    "decompostiton mode is"
                    + " :- NO_DECOMPOSITION");
            else if (mode == 1)
                System.out.println(
                    "decompostiton mode is "
                    + ":- CANONICAL_DECOMPOSITION");
            else
                System.out.println(
                    "decompostiton mode is "
                    + ":- FULL_DECOMPOSITION. ");
        }

        catch (ClassCastException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

输出:

decompostiton mode is :- CANONICAL_DECOMPOSITION

例 2:

// Java program to demonstrate
// getDecomposition() 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
                = Collator.getInstance(Locale.UK);

            // getting decompostiton mode
            // using getDecomposition() mehtod
            int mode = col.getDecomposition();

            // display result
            if (mode == 0)
                System.out.println(
                    "decompostiton mode is"
                    + " :- NO_DECOMPOSITION");
            else if (mode == 1)
                System.out.println(
                    "decompostiton mode is "
                    + ":- CANONICAL_DECOMPOSITION");
            else
                System.out.println(
                    "decompostiton mode is "
                    + ":- FULL_DECOMPOSITION. ");
        }

        catch (ClassCastException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

输出:

decompostiton mode is :- NO_DECOMPOSITION

参考:https://docs . Oracle . com/javase/9/docs/API/Java/text/collator . html # getDecomposition–

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