import java.util.Arrays;

public class Test {
    public static void main(String[] args) {
        //数组的定义
        //int[] a = new int[5];
        //int a1[] = new int[3];
        
        //int[] a2 = {2, 4, 6};
        
        int[] a = new int[4];
        boolean[] b = new boolean[4];
        char[] c = new char[4];
        
        System.out.println(Arrays.toString(a));
        System.out.println(Arrays.toString(b));
        System.out.println(Arrays.toString(c));
        //二维数组定义
        //int[][] aa = new int[4][];
        
        //填充数组
        Arrays.fill(a, 7);
        //填充一部分数组
        Arrays.fill(a, 0, 2, 8);
        //复制数组
        int[] newa = Arrays.copyOf(a, 3);
        //复制一部分数组
        int[] newa1 = Arrays.copyOfRange(a, 0, 2);
        //数组排序
        int[] aa = new int[]{24,54,33,55,43,53};
        Arrays.sort(aa);
        p(aa);
        //数组的查询, 使用的是二分搜索法
        int m = Arrays.binarySearch(aa, 54);
        
        int n = Arrays.binarySearch(aa, 0, 3, 54);
        
        
        System.out.println(n);

    }
    
    
    private static void p(int[] o) {
        System.out.println(Arrays.toString(o));
    }
    
}