Java Character isBmpCodePoint() 方法

6 Nov 2024 | 3 分钟阅读

Character 类的 isBmpCodePoint(int codePoint) 方法通常用于判断给定的（或指定的）Unicode 字符是否位于基本多语言平面 (BMP) 的范围内。这些指定的 codePoint 可以通过单个 char 值表示。

语法

参数

上述方法只需要一个参数

a.)需要测试的 Unicode 字符的 codePoint。

返回值

Character 类的 isBmpCodePoint(int codePoint) 方法返回布尔值，如果指定的 codePoint 介于 MIN_VALUE 和 MAX_VALUE 之间，则返回 true；否则返回 false。

示例 1

public class JavaCharcterisBmpCodePointExample1 {
public static void main(String[] args) {     	
	char cp1 = ' ';
	char cp2 = 'A';
	char cp3 = 'B';
	char cp4 = 'a';
	char cp5 = 'b';
    boolean b1 = Character.isBmpCodePoint(cp1);
    boolean b2 = Character.isBmpCodePoint(cp2);
    boolean b3 = Character.isBmpCodePoint(cp3);
    boolean b4 = Character.isBmpCodePoint(cp4);
    boolean b5 = Character.isBmpCodePoint(cp5);
    System.err.println("The value for the first char comes to be:  "+b1);
    System.err.println("The value for the second char comes to be: "+b2);
    System.err.println("The value for the third char comes to be:  "+b3);
    System.err.println("The value for the fourth char comes to be: "+b4);
    System.err.println("The value for the fifth char comes to be:  "
    +b5);
  }
}

输出

The value for the first char comes to be:  true
The value for the second char comes to be: true
The value for the third char comes to be:  true
The value for the fourth char comes to be: true
The value for the fifth char comes to be:  true

示例 2

public class JavaCharcterisBmpCodePointExample2 {
public static void main(String[] args) {	
   // Initialize the codePoints.
         int codepoint1 = 12;
	  int codepoint2 = 121;
	  int codepoint3 = 684748;	
  // Check the codepoints whether they are in Basic Multilingual Plane (BMP).
	  boolean result1 = Character.isBmpCodePoint(codepoint1);
	  boolean result2 = Character.isBmpCodePoint(codepoint2);
	  boolean result3 = Character.isBmpCodePoint(codepoint3);
 // Finally print the result.
System.out.println("The boolean value for the first codePoint is given as:  "+result1);
System.out.println("The boolean value for the second codePoint is given as:  "+result2);	
System.out.println("The boolean value for the third codePoint is given as:  "+result3);	
	}
}

输出

The boolean value for the first codePoint is given as:  true
The boolean value for the second codePoint is given as:  true
The boolean value for the third codePoint is given as:  false

示例 3

public class JavaCharcterisBmpCodePointExample3 {
public static void main(String[] args) {     	
	char cp1 = '1';
	char cp2 = '2';
	char cp3 = '3';
	char cp4 = '4';
	char cp5 = '5';
    boolean b1 = Character.isBmpCodePoint(cp1);
    boolean b2 = Character.isBmpCodePoint(cp2);
    boolean b3 = Character.isBmpCodePoint(cp3);
    boolean b4 = Character.isBmpCodePoint(cp4);
    boolean b5 = Character.isBmpCodePoint(cp5);
    System.err.println("The value for the first char comes to be:  "+b1);
    System.err.println("The value for the second char comes to be: "+b2);
    System.err.println("The value for the third char comes to be:  "+b3);
    System.err.println("The value for the fourth char comes to be: "+b4);
    System.err.println("The value for the fifth char comes to be:  "+b5);
  }
}

输出

The value for the first char comes to be:  true
The value for the second char comes to be: true
The value for the third char comes to be:  true
The value for the fourth char comes to be: true
The value for the fifth char comes to be:  true

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Java Character isBmpCodePoint() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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Java Character isBmpCodePoint() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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