Java獲取變量的數據類型

public class Int_String_Char {

	public static void main(String[] args) {
		byte a1=2;
		short a2=2;
		int a3=1;
		long a4=2L;
		System.out.println(getType(a1));
		System.out.println(getType(a2));
		System.out.println(getType(a3));
		System.out.println(getType(a4));
		
		float f=1.00f;
		double d=1.00d;
		System.out.println(getType(f));
		System.out.println(getType(d));
		
		boolean b=true;
		System.out.println(getType(b));
		
		char c='a';
		System.out.println(getType(c));
		
		String s="abc";
		System.out.println(getType(s));
	}
	
	private static String getType(Object a) {
		return a.getClass().toString();

	}
}

代碼運行結果：

class java.lang.Byte
class java.lang.Short
class java.lang.Integer
class java.lang.Long
class java.lang.Float
class java.lang.Double
class java.lang.Boolean
class java.lang.Character
class java.lang.String