Java一个小练习----String类型转换int类型-蒲公英云

Java一个小练习----String类型转换int类型

向右看齐 2023-01-15 13:30 195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);
    }
}