Java - Character isMirrored() 方法

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描述

Java 的 Character isMirrored() 方法用于确定字符是否根据 Unicode 规范进行镜像。在从右到左阅读的文本中显示时，镜像字符的字形（也称为其设计或表示）应水平镜像。

例如，'\u0028' 左括号是 Unicode 字符的开括号。它在从左到右的文本中将显示为 "("，但在从右到左的文本中将显示为 ")"。

此方法以两种多态形式出现，具有不同的参数类型：char 值和整数代码点值。

语法

以下是 Java Character isMirrored() 方法的语法

public static boolean isMirrored(char ch)
(or)
public static boolean isMirrored(int codePoint)

参数

• ch - 请求镜像属性的字符

• codePoint - 请求镜像属性的 Unicode 代码点

返回值

如果字符是镜像的，则此方法返回 true；如果字符不是镜像的或未定义，则返回 false。

检查字符是否镜像的示例

以下示例显示了 Java Character isMirrored(char ch) 方法的用法。我们用两个字符值初始化了两个字符变量。使用 isMirrored() 方法，我们检查字符变量是否包含镜像字符。然后打印结果。

package com.tutorialspoint;

public class CharacterDemo {
   public static void main(String[] args) {

      // create 2 char primitives ch1, ch2
      char ch1, ch2;

      // assign values to ch1, ch2
      ch1 = '}';
      ch2 = '^';

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

      // check if ch1, ch2 are mirrored and assign results to b1, b2
      b1 = Character.isMirrored(ch1);
      b2 = Character.isMirrored(ch2);

      String str1 = ch1 + " is a mirrored character is " + b1;
      String str2 = ch2 + " is a mirrored character is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );
   }
}

输出

让我们编译并运行以上程序，这将产生以下结果：

} is a mirrored character is true
^ is a mirrored character is false

检查代码点是否镜像的示例

以下示例显示了 Java Character isMirrored(int codepoint) 方法的用法。我们用两个代码点值初始化了两个整型变量。使用 isMirrored() 方法，我们检查整型变量是否包含镜像字符。然后打印结果。

package com.tutorialspoint;

public class CharacterDemo {
   public static void main(String[] args) {

      // create 2 int primitives cp1, cp2
      int cp1, cp2;

      // assign values to cp1, cp2
      cp1 = 0x0c01;
      cp2 = 0x003c; // represents <

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

      /**
       *  check if cp1, cp2 represent mirrored characters
       *  and assign results to b1, b2
       */
      b1 = Character.isMirrored(cp1);
      b2 = Character.isMirrored(cp2);
      String str1 = "cp1 represents a mirrored character is " + b1;
      String str2 = "cp2 represents a mirrored character is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );
   }
}

输出

让我们编译并运行以上程序，这将产生以下结果：

cp1 represents a mirrored character is false
cp2 represents a mirrored character is true

检查字符是否镜像的示例

由于此方法的返回类型为布尔值，因此我们还可以将条件语句与该方法作为其条件一起使用，以检查字符是否为镜像字符。

package com.tutorialspoint;

public class MirroredDemo{
   public static void main(String []args) {
      char c1 = '[';
      char c2 = '{';
      char c3 = '/';
      if(Character.isMirrored(c1)) {
         System.out.println(c1 + " is the mirrored character");
      }
      if(Character.isMirrored(c2)) {
         System.out.println(c2 + " is the mirrored character");
      }
      if(Character.isMirrored(c3)) {
         System.out.println(c3 + " is the mirrored character");
      }
      else {
         System.out.println("Not a mirrored character");
      }
   }
}

输出

编译并运行以上程序以显示以下输出：

[ is the mirrored character
{ is the mirrored character
Not a mirrored character

检查字符是否镜像的示例

条件语句也可以在循环中使用。在这里，我们初始化一个字符数组，并使用循环语句将其元素作为参数传递给方法。每个元素都使用条件语句检查是否为镜像字符。

package com.tutorialspoint;

public class MirroredDemo{
   public static void main(String []args) {
      char c[] = {'(', ']', '-', '{', '<', '|'};
      for(int i = 0; i < c.length; i++) {
         if(Character.isMirrored(c[i])) {
            System.out.println(c[i] + " character is mirrored");
         }
         else {
            System.out.println(c[i] + " character is not mirrored");
         }
      }
   }
}

输出

编译并运行以上程序后，将显示以下输出：

( character is mirrored
] character is mirrored
- character is not mirrored
{ character is mirrored
< character is mirrored
| character is not mirrored