这个 JAVA朗,性格。isISOControl() 是java中的内置方法,用于确定指定字符是否为ISO控制字符。如果一个字符的代码在“u0000”到“u001F”之间,或在“u007F”到“u009F”之间,则该字符被视为ISO控制字符。此方法无法处理补充字符。为了支持所有Unicode字符,包括补充字符,在上述方法中,参数可以是int数据类型。
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语法:
public static boolean isISOControl(data_type ch)
参数: 该函数只接受一个参数 中国 这是强制性的。它指定要测试的字符。参数可以是char或int数据类型。
返回值: 该函数返回一个布尔值。如果字符是ISO控制字符,则布尔值为true,否则为false。
以下程序说明了上述方法:
项目1:
// java program to demonstrate // Character.isISOControl() method // when the parameter is a character import java.lang.*; public class gfg { public static void main(String[] args) { // create 2 char primitives c1, c2 and assign values char c1 = '-' , c2 = 'u0017' ; // assign isISOControl results of c1 // to boolean primitives bool1 boolean bool1 = Character.isISOControl(c1); if (bool1) System.out.println(c1 + " is an ISO control character" ); else System.out.println(c1 + " is not an ISO control character" ); // assign isISOControl results of c2 // to boolean primitives bool2 boolean bool2 = Character.isISOControl(c2); if (bool2) System.out.println(c2 + " is an ISO control character" ); else System.out.println(c2 + " is not an ISO control character" ); } } |
输出:
- is not an ISO control character is an ISO control character
项目2:
// java program to demonstrate // Character.isISOControl(char ch) method // when the parameter is an integer import java.lang.*; public class gfg { public static void main(String[] args) { // create 2 char primitives c1, c2 and assign values int c1 = 0x008f ; int c2 = 0x0123 ; // assign isISOControl results of c1 // to boolean primitives bool1 boolean bool1 = Character.isISOControl(c1); if (bool1) System.out.println(c1 + " is an ISO control character" ); else System.out.println(c1 + " is not an ISO control character" ); // assign isISOControl results of c2 // to boolean primitives bool2 boolean bool2 = Character.isISOControl(c2); if (bool2) System.out.println(c2 + " is an ISO control character" ); else System.out.println(c2 + " is not an ISO control character" ); } } |
输出:
143 is an ISO control character 291 is not an ISO control character
参考 : https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isISOControl(字符)
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