Java-Arrays类-fill()方法详解

Posted 2020-10-13

fill()方法使用参考

声明举例：

public static void fill(int[] a, form, to, int var) 

参数：

a--数组

form--替换开始位置（包括）

to--替换结束位置（不包括）

var--要替换的值

使用参考实例：

public class Test {
    
    public static void main(String[] args) {
        
        int[] a = new int[]{1,2,3,4,5,6};
        System.out.println(Arrays.toString(a));  //{1,2,3,4,5,6}
    
        Arrays.fill(a, 0);
        System.out.println(Arrays.toString(a));  //{0,0,0,0,0,0}    
        
        int[] b = new int[]{1,2,3,4,5,6};
        Arrays.fill(b, 2, 4, 0);
        System.out.println(Arrays.toString(b));  //{1,2,0,0,5,6}
        
        Boolean[] c = {true,false};
        System.out.println(Arrays.toString(c));  //{true,false}
        Arrays.fill(c, false);
        System.out.println(Arrays.toString(c));  //{false,false}
        Arrays.fill(c, 0, 1, true);
        System.out.println(Arrays.toString(c));  //{true,false}
        
        String[] d = {"a","b","c","d","e","f"};
        System.out.println(Arrays.toString(d));  //{a,b,c,d,e,f}
        Arrays.fill(d, 1, 2, "HelloWorld");
        System.out.println(Arrays.toString(d));  //{a,HelloWorld,c,d,e,f}
        
    }
}