Java中的字符 .isHighSurrogate() 方法及示例

Java.lang。 字符.isHighSurrogate()是Java中的内置方法，用于确定给定的 char 值是否是 Unicode 高代理代码单元（也称为前导代理代码单元）。这些值本身并不表示字符，而是用于表示 UTF-16 编码中的补充字符。

句法：

public static boolean isHighSurrogate(char ch)

参数：该函数接受一个强制参数ch ，该参数指定要测试的值。

返回值：函数返回一个布尔值。如果 char 值介于 MIN_HIGH_SURROGATE 和 MAX_HIGH_SURROGATE 之间，则返回值为True ，否则返回False 。

下面的程序说明了字符.isHighSurrogate() 方法：

方案一：

// Java program to illustrate the
// Character.isHighSurrogate() method
import java.lang.*;
  
public class gfg {
  
    public static void main(String[] args)
    {
  
        // create 2 char primitives c1, c2
        char c1 = '\u0a4f', c2 = '\ud8b4';
  
        // assign isHighSurrogate results of
        // c1, c2 to boolean primitives bool1, bool2
        boolean bool1 = Character.isHighSurrogate(c1);
        System.out.println("c1 is a Unicode"+
        "high-surrogate code unit ? " + bool1);
  
        boolean bool2 = Character.isHighSurrogate(c2);
        System.out.println("c2 is a Unicode"+ 
        "high-surrogate code unit ? " + bool2);
    }
}

输出：

c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? true

方案二：

// Java program to illustrate the
// Character.isHighSurrogate() method
import java.lang.*;
  
public class gfg {
  
    public static void main(String[] args)
    {
  
        // create 2 char primitives c1, c2
        char c1 = '\u0b9f', c2 = '\ud5d5';
  
        // assign isHighSurrogate results of
        // c1, c2 to boolean primitives bool1, bool2
        boolean bool1 = Character.isHighSurrogate(c1);
        System.out.println("c1 is a Unicode" + 
        "high-surrogate code unit ? " + bool1);
  
        boolean bool2 = Character.isHighSurrogate(c2);
        System.out.println("c2 is a Unicode" + 
        "high-surrogate code unit ? " + bool2);
    }
}

输出：

c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? false