class Variable
{
    public static int i;
    private int j;
    public void intplay()
    {
        int  k=0;
        i++;
        j++;
        k++;
        System.out.print("i="+i);
        System.out.print(" j="+j);
        System.out.println(" k="+k);
    }
    public void allDisplay()
    {
        intplay();
        intplay();
    }
}
public class E_varible
{
    public static void main(String[] args)
    {
        Variable var1=new Variable();
        Variable var2=new Variable();
        var1.allDisplay();
        var2.allDisplay();
    }
}
错误是E_variable是公共类，不太懂啊- _ -||