Java array and convert each string

Array -> String: String.valueOf (array)
string -> Array: an array of strings = toCharArray (); Print: of Arrays.toString (array).

public static void main(String[] args) {
		//1.字符数组 转换成 字符串
		//(1)直接在构造String时转换
		char[] a = new char[] {'a','b','c','d'};
		String s = new String(a);
		System.out.println(s);
		
		//(2)调用String类的提供的方法的valueOf()
		String s2 = String.valueOf(a);
		System.out.println(s2);
		
		//2.字符串  转换成 字符数组 
		//(1)调用String类的提供的方法的toCharArray()
		String msg = "abcdef";
		char[] d= msg.toCharArray();
		System.out.println(Arrays.toString(d));
	}

Run Results:
ABCD
ABCD
[A, B, C, D, E, F]

String array -> Character: str.charAt (index)
Examples: a little

String-to-digital: Integer.parseInt (str)

		String s = "123456";
		int a=Integer.parseInt(s)+1;
		System.out.println(a);

The result:
123457

Digital-to-string: String.valueOf (num)

		int b =123;
		String v =String.valueOf(b);
		System.out.println(v);

The result:
123