Java获取变量的数据类型

编写一个getType方法查看变量数据类型

点击查看代码

	public String getType(Object obj) {
		String str = obj.getClass().toString().replace(".", " ");
		String[] astr = str.split(" ");
        return astr[astr.length-1];
    }

测试

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	public static void main(String[] args) {
		int i = 0;
		double d = 2.5;
		Integer I = 5;
		String str = "Hello";
		BigDecimal bi = BigDecimal.valueOf(5.20);
		System.out.println(new Main().getType(i));
		System.out.println(new Main().getType(I));
		System.out.println(new Main().getType(str));
		System.out.println(new Main().getType(bi));
	}

结果

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Integer
Integer
String
BigDecimal
 

全部

点击查看代码

package com.bingbaihanji;
 
import java.math.BigDecimal;
 
public class Main {
	public static void main(String[] args) {
		int i = 0;
		double d = 2.5;
		Integer I = 5;
		String str = "Hello";
		BigDecimal bi = BigDecimal.valueOf(5.20);
		System.out.println(new Main().getType(i));
		System.out.println(new Main().getType(I));
		System.out.println(new Main().getType(str));
		System.out.println(new Main().getType(bi));
	}
	/**
	 * @Title: getType
	 * @Description: Java获取变量的数据类型
	 * @param: obj
	 * @param: 变量
	 * @return: String 返回类型
	 */
	public String getType(Object obj) {
		String str = obj.getClass().toString().replace(".", " ");
		String[] astr = str.split(" ");
        return astr[astr.length-1];
    }
 
}