Java Character. isSupplementaryCodePoint() 方法

2025年5月9日 | 阅读 4 分钟

Java 中的 Character.isSupplementaryCodePoint() 方法 用于检查给定的 Unicode 代码点是否在补充字符范围内。

语法

参数

codePoint： 代表 Unicode 代码点的 int 值。

返回值

如果代码点在补充范围内（0x10000 到 0x10FFFF），则为 true。
否则为 false。

程序 1

以下 Java 程序演示了如何使用 Character.isSupplementaryCodePoint() 方法来检查两个 Unicode 代码点（0x10FFD 和 0x154CA）是否在补充范围（0x10000 到 0x10FFFF）内。结果会显示带有描述性消息。

public class SupplementaryCodePointExample { // Class declaration
    public static void main(String[] args) { // Main method begins
        // Define the first Unicode code point in hexadecimal format
        int codePoint1 = 0x10FFD; 
        // Define the second Unicode code point in hexadecimal format
        int codePoint2 = 0x154CA; 
        // Check if codePoint1 is in the supplementary code point range
        boolean isSupplementary1 = Character.isSupplementaryCodePoint(codePoint1);
        // Check if codePoint2 is in the supplementary code point range
        boolean isSupplementary2 = Character.isSupplementaryCodePoint(codePoint2);
        // Create a message indicating whether codePoint1 is a supplementary code point
        String message1 = "Is codePoint1 a supplementary code point? " + isSupplementary1;
        // Create a message indicating whether codePoint2 is a supplementary code point
        String message2 = "Is codePoint2 a supplementary code point? " + isSupplementary2;
        // Print the result message for codePoint1
        System.out.println(message1);
        // Print the result message for codePoint2
        System.out.println(message2);
    }
}   

输出

 
Is codePoint1 a supplementary code point? true
Is codePoint2 a supplementary code point? true

程序 2

以下 Java 程序说明了 Character.isSupplementaryCodePoint() 方法在 Java 中的应用。它验证了两个 Unicode 代码点（0x45FFD 和 0x004CA）是否位于补充范围（0x10000 到 0x10FFFF）内。结果以布尔值的形式显示，表示每个代码点是否被归类为补充字符。

public class SupplementaryCodePointDemo { 
    public static void main(String[] args) { 
        // Declare the first Unicode code point using hexadecimal value
        int codePoint1 = 0x45FFD; // This represents a specific Unicode character
        // Declare the second Unicode code point using hexadecimal value
        int codePoint2 = 0x004CA; // This represents another Unicode character
        boolean isSupplementary1 = Character.isSupplementaryCodePoint(codePoint1);
        // Check if the second code point is in the supplementary range
        boolean isSupplementary2 = Character.isSupplementaryCodePoint(codePoint2);
        // Create a result string for the first code point indicating whether it's supplementary
        String result1 = "Is codePoint1 a supplementary code point? " + isSupplementary1;
        // Create a result string for the second code point indicating whether it's supplementary
        String result2 = "Is codePoint2 a supplementary code point? " + isSupplementary2;
        // Print the result for the first code point
        System.out.println(result1);
        // Print the result for the second code point
        System.out.println(result2);
    }
}   

输出

 
Is codePoint1 a supplementary code point? true
Is codePoint2 a supplementary code point? false

程序-3：检查代码点是否为补充代码点

Java 中的 Character.isSupplementaryCodePoint() 函数提供布尔结果，使其适合在 if-else 等条件表达式中使用。下面是一个展示其用法的专业示例

public class SupplementaryCodePointExample {
    public static void main(String[] args) {
        // Define a Unicode code point to check
        int codePoint = 0x1F60D; 
        if (Character.isSupplementaryCodePoint(codePoint)) {
            System.out.println("The provided code point is a supplementary character.");
        } else {
            System.out.println("The provided code point is not a supplementary character.");
        }
    }
}   

输出

 
The code point represents a supplementary character.

程序-4：使用循环检查代码点是否为补充代码点

除了使用条件语句，还可以使用循环结构来遍历 Unicode 代码点的数组。使用 Character.isSupplementaryCodePoint() 方法检查每个代码点，以确定它是否是补充字符。下面是一个演示此方法的专业示例

public class SupplementaryCodePointArrayExample { // Class declaration
    public static void main(String[] args) { // Main method begins
        // Define an array of Unicode code points using hexadecimal values
        int[] codePoints = {0x1F60D, 0x0041, 0x10FFD, 0x004CA}; // Array of code points
        // Loop through each code point in the array using a for-each loop
        for (int codePoint : codePoints) {
            if (Character.isSupplementaryCodePoint(codePoint)) {
                // Print a message indicating the code point is supplementary
                System.out.println("Code point " + Integer.toHexString(codePoint) + " is a supplementary character.");
            } else { // If the code point is not supplementary
                // Print a message indicating the code point is not supplementary
                System.out.println("Code point " + Integer.toHexString(codePoint) + " is not a supplementary character.");
            }
        } // End of the loop
    } // End of the main method
} // End of the class   

输出

 
Code point 1f60d is a supplementary character.
Code point 41 is not a supplementary character.
Code point 10ffd is a supplementary character.
Code point 4ca is not a supplementary character.

下一主题Java 编码软件

Java Character. isSupplementaryCodePoint() 方法

程序 1

程序 2

程序-3：检查代码点是否为补充代码点

程序-4：使用循环检查代码点是否为补充代码点

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Java Character. isSupplementaryCodePoint() 方法

程序 1

程序 2

程序-3：检查代码点是否为补充代码点

程序-4：使用循环检查代码点是否为补充代码点

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