认识Arrays（1）打印

认识Arrays（一）打印

Arrays提供了一组操作array的静态方法。

一、基本类型数组打印

public static void printBaseArray(){int[] ar = new int[10];    for (int i=0; i < ar.length; i++) {      ar[i] = (1000 - (300 + i));    }    System.out.println("打印基本类型数组:"+Arrays.toString(ar));}

?输出结果：

打印基本类型数组:[700, 699, 698, 697, 696, 695, 694, 693, 692, 691]

?二、对象类型数组打印

public static void printObjectArray(){Random random = new Random();Cell[] cells = new Cell[10];for(int i=0;i<10;i++){cells[i] = new Cell(random.nextInt(50),random.nextInt(50));}System.out.println("打印对象类型数组:"+Arrays.toString(cells));}

public class Cell {private int x;private int y;public Cell(int x,int y){this.x = x;this.y = y;}public String toString(){return "x="+x+",y="+y;}}

?输出结果：

打印对象类型数组:[x=24,y=38, x=0,y=9, x=5,y=1, x=36,y=9, x=36,y=38, x=47,y=2, x=45,y=32, x=9,y=46, x=36,y=5, x=17,y=3]