Java一个小练习----String类型转换int类型

向右看齐 2023-01-15 13:30 131阅读 0赞

## Java一个小练习 ##

把字符串str分割程String数组，然后转换成int数组，排序

String str = "123 345 89 93 2 6573 223"

然后在拼接成一个字符串如下：

"2 89 93 123 223 345 6573"

/**
     * String str = "123 345 89 93 2 6573 223"
     * 把字符串str分割程String数组，然后转换成int数组，排序
     * 然后在拼接成一个字符串如下：
     * "2 89 93 123 223 345 6573"
     */
    public class StringToInt {
        public static void main(String[] args) {
            String str = "123 345 89 93 2 6573 223";
    
            //输出原字符串
            System.out.println("str1  =  "+str);
    
            //分割字符串给赋给arr数组
            String[] arr = str.split(" ");
    
            //输出arr数组
            System.out.print("arr = ");
            for (int i = 0; i < arr.length; i++) {
                System.out.print(arr[i]+"\t");
            }
            System.out.println();
    
            int []arrInt = new int[str.length()];
    
            //String转int
            for (int i = 0; i < arr.length; i++) {
                arrInt[i] = Integer.parseInt(arr[i]);
            }
    
            //遍历int数组
            System.out.print("arrInt = ");
            for (int i = 0; i < arr.length; i++) {
                System.out.print(arrInt[i]+"\t");
            }
            System.out.println();
    
            //排序
            for (int i = 0; i < arr.length-1; i++) {
                for (int j = 0; j < arr.length-1-i; j++) {
                    int arr1;
                    if (arrInt[j]>arrInt[j+1]){
                        arr1 = arrInt[j];
                        arrInt[j] = arrInt[j+1];
                        arrInt[j+1] = arr1;
                    }
                }
            }
    
            System.out.print("排好序的新数组 = ");
            for (int i = 0; i < arr.length; i++) {
                System.out.print(arrInt[i]+"\t");
            }
            System.out.println();
    
            //int数组转换String
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < arr.length; i++) {
                sb.append(arrInt[i]+" ");
            }
            System.out.print("sb = "+sb);
    
    
        }
    }

运行结果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ4NzU5NjY0_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ4NzU5NjY0_size_16_color_FFFFFF_t_70]: /images/20221022/ee1f838cd3a44b61bdcd3d711d3b2419.png