查看创建对象数目

package 创建对象数目;

import java.nio.charset.MalformedInputException;

public class Sum {
private static int m=0;
public Sum()
{
    m++;
}
public static int getsum()
{
    return m;
}
public static void main(String[] args) {
    Sum a1=new Sum();
    Sum a2=new Sum();
    Sum a3=new Sum();
    System.out.println("创建对象数目："+Sum.getsum());
}
}