Java数组

public class Example_3 {

	public static void main(String[] args) {
		//数组的使用
		float a[] = new float[5];//定义数组并没创建数组
		System.out.println(a.length);//输出数组的长度
		int b[] = {1,2,3,40};//定义数组并初始化
		b = new int[4];//创建数组大小为4
		System.out.println(b.length);
		System.out.println("b[0]="+b[0]+"\n"+"b[1]="+b[1]);
		System.out.println("---------------");
		//创建二维数组
		int c[][] = {{1,1},{2,2},{3,3}};
		c = new int[3][2];
		System.out.println(c.length);
		System.out.println(c[1][0]);//没能输出
		System.out.println("---------------");
		
		int d[] = {1,2,3,4};
		int f[] = {100,200,300};
		System.out.println("数组d的元素个数="+d.length);
		System.out.println("数组的f的个数="+f.length);
		System.out.println("数组d的引用="+d);
		System.out.println("数组的f的引用="+f);
		d=f;
		System.out.println("数组d的元素个数="+d.length);
		System.out.println("数组的f的个数="+f.length);
		System.out.println("d[0]="+d[0]+",d[1]="+d[1]+",d[2]="+d[2]);
		

	}

}