Java 中的 character . islowSuperation()方法，带示例
原文:https://www . geeksforgeeks . org/character-islowsubject-method-in-Java-with-examples/
java . lang . character . islowSuperation(char ch)是 Java 中的一个内置方法，它确定给定的 char 值是否是 Unicode 低代理代码单元(也称为尾随代理代码单元)。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。
语法:
public static boolean isLowSurrogate(char ch)
参数:该功能接受一个强制参数 ch ，指定要测试的字符。
返回值:函数返回一个布尔值。如果字符值介于最小 _ 低 _ 代理和最大 _ 低 _ 代理之间(含这两个值)，则返回值为真，否则返回值为假。
下面的程序说明了 Character.isLowSurrogate()方法:
程序 1:
// Java program to illustrate the
// Character.isLowSurrogate() method
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// create 2 char primitives c1, c2
char c1 = '\udc25', c2 = 'h';
// assign isLowSurrogate results of
// c1, c2 to boolean primitives bool1, bool2
boolean bool1 = Character.isLowSurrogate(c1);
System.out.println("c1 is a Unicode low-surrogate ? " + bool1);
boolean bool2 = Character.isLowSurrogate(c2);
System.out.println(c2 + " is a Unicode low-surrogate ? " + bool2);
}
}
输出:
c1 is a Unicode low-surrogate ? true
h is a Unicode low-surrogate ? false
程序二:
// Java program to illustrate the
// Character.isLowSurrogate() method
import java.lang.*;
public class gfg {
public static void main(String[] args)
{
// create 2 char primitives c1, c2
char c1 = '\udc29', c2 = 'x';
// assign isLowSurrogate results of
// c1, c2 to boolean primitives bool1, bool2
boolean bool1 = Character.isLowSurrogate(c1);
System.out.println("c1 is a Unicode low-surrogate ? " + bool1);
boolean bool2 = Character.isLowSurrogate(c2);
System.out.println(c2 + " is a Unicode low-surrogate ? " + bool2);
}
}
输出:
c1 is a Unicode low-surrogate ? true
x is a Unicode low-surrogate ? false
参考:T2【https://docs . Oracle . com/javase/7/docs/API/Java/lang/character . html # isLowSurrogate(char)
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