Language/Java
[Java] String to Integer, Integer to String
_Hiiro
2022. 10. 9. 21:52
String to Integer
import java.util.Arrays;
// string to int
String str = "100";
int num = Integer.parseInt(str);
// string array to int Array
String[] strArr = {"100", "200", "300"};
int[] intArr = Arrays.stream(strArr)
.mapToInt(Integer::parseInt) //mapToInt(x->Integer.parseInt(x))
.toArray();
System.out.println(Arrays.toString(intArr)); //[100,200,300]
Integer to String
import java.util.Arrays;
// int to String
int num = 100;
String str1 = Integer.toString(num);
String str2 = String.valueOf(num);
// int array to String Array
int[] intArr = {100, 200, 300};
String[] strArr = Arrays.stream(intArr)
.mapToObj(String::valueOf) //mapToInt(x->String.valueOf(x))
.toArray(String[]::new);
System.out.println(Arrays.toString(strArr)); //[100,200,300]
참고 레퍼런스