Java Class.isPrimitive()判断是否是基本类型的字节码
Class.isPrimitive()判定指定的Class对象是否表示一个Java的基类型(boolean、char、byte、short、int、long、float、double)。
定义
public boolean isPrimitive()
返回值:此方法返回true,当且仅当这个类表示一个基本类型。
例子
判断是否是基本类型的字节码
public class TestReflect { public static void main(String[] args) { // TODO Auto-generated method stub String str = "abc"; Class cls1 = str.getClass(); Class cls2 = String.class; Class cls3 = null;//必须要加上null try { cls3 = Class.forName("java.lang.String"); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(cls1==cls2); System.out.println(cls1==cls3); System.out.println(cls1.isPrimitive()); System.out.println(int.class.isPrimitive());//判定指定的 Class 对象是否表示一个基本类型。 System.out.println(int.class == Integer.class); System.out.println(int.class == Integer.TYPE); System.out.println(int[].class.isPrimitive()); System.out.println(int[].class.isArray()); } }
执行结果:
true true false true false true false true
java原始类型判断
public static void main(String[] args){ Class stringClass=String.class; System.out.println("String is primitive type:"+stringClass.isPrimitive()); Class booleanClass=Boolean.class; System.out.println("Boolean is primitive type:"+booleanClass.isPrimitive()); Class booleanType=boolean.class; System.out.println("boolean is primitive type:"+booleanType.isPrimitive()); Class byteType=byte.class; System.out.println("byte is primitive type:"+byteType.isPrimitive()); Class charType=char.class; System.out.println("char is primitive type:"+charType.isPrimitive()); Class shortType=short.class; System.out.println("short is primitive type:"+shortType.isPrimitive()); Class intType=int.class; System.out.println("int is primitive type:"+intType.isPrimitive()); Class longType=long.class; System.out.println("long is primitive type:"+longType.isPrimitive()); Class floatType=float.class; System.out.println("float is primitive type:"+floatType.isPrimitive()); Class doubleType=double.class; System.out.println("double is primitive type:"+doubleType.isPrimitive()); }
执行结果:
String is primitive type:false Boolean is primitive type:false boolean is primitive type:true byte is primitive type:true char is primitive type:true short is primitive type:true int is primitive type:true long is primitive type:true float is primitive type:true double is primitive type:true
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