常用转换(一)

1.int类型数组 转换为String类型数据 => for循环

public static void intArrayToStringArray() {
    //1.int[] 数组 变为  String[]数组
    int[] nums = {1, 3, 5, 66, 7, 4};
    String[] str = new String[nums.length];
    for (int i = 0; i < nums.length; i++) {
        str[i] = String.valueOf(nums[i]);
    }
}

2.String[]数组变成String类型

public static void stringArrayToString() {
    //2.String[]数组变成String类型
    //遍历String[]数组
    String[] str = {"1", "2", "4", "55", "3"};
    StringBuilder sb = new StringBuilder();
    for (String s : str) {
        sb.append(s);
    }
    String result = sb.toString();
}

3.字符串变字符数组

public static void stringToOther() {
    String str = "fjeifiehg";
    //字符串变字符数组
    char[] chars = str.toCharArray();
}

4.将字符串"算法-数据结构-网络-计算机组成原理-操作系统"转换为字符数组{"``算法","数据结构","网络","计算机组成原理","操作系统"``}

String labels = "算法-数据结构-网络-计算机组成原理-操作系统";
List<String> labelList = new ArrayList<>();
  if (labels.contains("-")) {
  labelList.addAll(Arrays.asList(labels.split("-")));
  } else {
}