Java数据类型转换

Java数据类型转换

数据类型的分类

字符串<=>字符数组

字符串转换为字符数组

String str = "123456";
char[] chars = str.toCharArray();

字符数组转化为字符串

char[] c = {'a','s','d','4','5',};
String str = new String(c);

---

字符数组<=>整型数组

字符数组转化为整型数组

char[] c = { '1', '2', '3', '4', '5', };
int[] arr = new int[c.length];
for (int i = 0; i < arr.length; i++) {
    a[i] = c[i] - '0';
}

整型数组转化为字符数组

int[] a = {1,2,3,4,5};
char[] c = new char[a.length];
for (int i = 0; i < c.length; i++) {
    c[i] = (char) (a[i]+'0');
}

---

字符串<=>整数

整型数转化为字符串

1.String str = Integer.toString(i);

2.String s = String.valueOf(i);

3.String s = "" + i;

字符串转化为整型数

int i = Integer.valueOf(str).intValue();

int i = Integer.parseInt(String str);

后续补充