stringdemo.java

javastingdemo java string的测试

class StringDemo 
{
	public static void main(String[] args) 
	{
		String s1=new String();
		//String s1="";
		char[] array={'J','a','v','a','!'};
		String s2=new String(array);
		String s3=new String(array,4,1);
		array[0]='j';
		String s4=new String("abcd");
		//String s4="abcd";
		System.out.println(s2);//Java! java!
		System.out.println(s3);
		System.out.println(s4);
		System.out.println("abcdef".length());
		System.out.println(s2+s4+(2+2));//<==>
		System.out.println(s2+s4+String.valueOf(2+2));
		Box ob=new Box();
		System.out.println(String.valueOf(ob));
		System.out.println(ob.toString());
		System.out.println(ob);
	}
}