question2.java

java课程的资料以及实验的代码

class Q2
{
	public Q2()
	{
		System.out.println(this.toString());
	}
	
	public Q2(String s)
	{
		System.out.println(this.toString()+" "+s);
	}
	
	public static void main(String args[])
	{
		Q2 myClass2;
		if (args.length>=1) myClass2=new Q2(args[0]);
		else myClass2=new Q2();
	}
	
}