public class Hello{ public static void main(String[] args){ String str = "12345"; String[] arr = new String[str.length() - 2]; for(int i = 0,j = 2; i < arr.length; i++){ if(i == 0){ arr[0] = str.substring(0,1); }else{ arr[i] = str.substring(i == 1 ? 1:(i+1),i == 1 ? 3:(i+3)); } } System.out.println(java.util.Arrays.toString(arr)); } }
第3个回答 2020-03-17
package com.minrisoft; public class fm { public static class StringConcatenation { public static void main(String[] args) { String message3="So say we all!"; System.out.println("s首次出现的索引值:"+message3.indexOf("s")); System.out.println("s末次出现的索引值:"+message3.lastIndexOf("s")); System.out.println(message3+"的奇数索引字符:"); for(int i=0;i<message3.length();i++) { if(i%2==1) { System.out.print(message3.charAt(i)+" "); } } } } }