java中打印数组

public class IOTools {
    public static void print(int[] nums) {
        System.out.print("[");
        if (nums.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < nums.length - 1; i ++) {
            System.out.print(nums[i] + " ");
        }
        System.out.print(nums[nums.length - 1]);
        System.out.println("]");
    }

    public static void print(char[] chars) {
        System.out.print("[");
        if (chars.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < chars.length - 1; i ++) {
            System.out.print(chars[i] + " ");
        }
        System.out.print(chars[chars.length - 1]);
        System.out.println("]");
    }

    public static void print(boolean[] booleans) {
        System.out.print("[");
        if (booleans.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < booleans.length - 1; i ++) {
            System.out.print(booleans[i] + " ");
        }
        System.out.print(booleans[booleans.length - 1]);
        System.out.println("]");
    }

    public static void print(String[] strings) {
        System.out.print("[");
        if (strings.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < strings.length - 1; i ++) {
            System.out.print(strings[i] + " ");
        }
        System.out.print(strings[strings.length - 1]);
        System.out.println("]");
    }

    public static void print(boolean[][] booleans) {
        System.out.print("[
");
        if (booleans.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < booleans.length - 1; i ++) {
            print(booleans[i]);
        }
        print(booleans[booleans.length - 1]);
        System.out.println("]");
    }

    public static void print(char[][] chars) {
        if (chars == null || chars.length == 0) {
            System.out.println("[]");
            return;
        }
        System.out.print("[
");
        for (int i = 0; i < chars.length - 1; i ++) {
            print(chars[i]);
        }
        print(chars[chars.length - 1]);
        System.out.println("]");
    }

    public static void print(int[][] nums) {
        System.out.print("[
");
        if (nums.length == 0) {
            System.out.println("]");
            return;
        }
        for (int i = 0; i < nums.length - 1; i ++) {
            print(nums[i]);
        }
        print(nums[nums.length - 1]);
        System.out.println("]");
    }

    public static void print(int num) {
        System.out.println(num);
    }

    public static void print(char num) {
        System.out.println(num);
    }

    public static void print(String str) {
        System.out.println(str);
    }

    public static void print(boolean bool) {
        System.out.println(bool);
    }

    public static void print(Collection<?> collection) {System.out.println(collection);}

}

在要调用的代码的开头加上：

import static XXX.print;

把其中的XXX替换成自己的包的位置（当然，如果用的是IDEA的话，是可以自己添加上的）。