java中split()方法以及常见算法经典案例

public class SplitTest {
    public static void main(String []args) {
        String str="abcdef ghi";
        String[] list=str.split(" ");
        for (String s:list
             ) {
            System.out.println(s);
        }
        String[] list1=str.split("");
        for (String s:list1
        ) {
            System.out.println(s);
        }
    }
}

public class SplitTest {
    public static void main(String []args) {
        String str="abcdef,,ghi";
        String[] list=str.split(",");
        for (String s:list
             ) {
            System.out.println(s);
        }
    }
}

public class SplitTest {
    public static void main(String []args) {
        String str="abc.def.ghi";
        String[] list=str.split("\\.");
        for (String s:list
             ) {
            System.out.println(s);
        }
    }
}

public class SplitTest {
    public static void main(String []args) {
        String str="2024-3-6";
        //双引号而非单引号，参数是字符串类型，不能大意认为"-"是单个字符。
        String[] list=str.split("-");
        for(String s:list){
            System.out.println(s);
        }
        //有限字符串数组长度的重载split（）；
        String[] list1=str.split("-",4);//虽然为4，但是最多分割两次
        for(String s:list1){
            System.out.println(s);
        }
        //多个分割字符的情况
        String str2="abcd.efg|hijk.mno";
        String[] list2=str2.split("\\.|\\|");
        for (String s:list2
        ) {
            System.out.println(s);
        }
    }
}

import java.util.Scanner;

public class SplitTest {
    public static void main(String []args) {
        Scanner input=new Scanner(System.in);
        //创建stringbuilder字符串来存储动态结果；
        StringBuilder stringBuilder=new StringBuilder();
        String str=input.next();
        //使用split()方法分割字符串
        String[] list=str.split("-");
        for (int i = 0; i <list.length ; i++) {
            //如果长度为1，则拼接字符串；
            if (list[i].length()==1){
                stringBuilder.append("0");
                stringBuilder.append(list[i]);
            }else {
                stringBuilder.append(list[i]);
            }
            //除了最后一个字符串，拼接"-";
            if(i!=list.length-1){
                stringBuilder.append("-");
            }
        }
        //打印结果
        System.out.println(stringBuilder);
    }
}