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  • String StringBuffer Arrays 字符串修改 拼接

    package Baozhuang;
    
    import java.util.Arrays;
    import java.util.Scanner;
    
    public class exe {
        public static void main(String[] args) {
            String s = "27O51I51022I8";
            s = s.replace('O', '0');
            s = s.replace('I', '1');
            System.out.println(s);
            
            String s0 = "MY_English_NaMe";
            String[] s1 = s0.split("_");
            s1[0] = s1[0].toLowerCase();
            s1[1] = s1[1].toUpperCase();
            s1[2] = s1[2].toUpperCase();
            //String 拼接
            String s2 =s1[0]+ s1[1]+s1[2];
            String s3 = s1[0].concat(s1[1]).concat(s1[2]);
            System.out.println(s3);
            System.out.println(s2);
            System.out.println(Arrays.toString(s1));
            //StringBuffer拼接
            StringBuffer s4 = new StringBuffer(s1[0]);
            s4 =  s4.append(s1[1]).append(s1[2]);
            System.out.println(s4);
            
            Scanner input = new Scanner(System.in);
            String word;
            StringBuffer s5 = new StringBuffer();
            do{
                System.out.println("请输入英文单词:");
                word = input.nextLine();
                if (word.equals("end")){
                    break;
                }
                s5 = s5.append(word+",");
            }while(true);
            System.out.println(s5);
            String s6 = s5.toString();
            String [] s7 = s6.split(",");
            /*for(int i = 0; i < s7.length ; i++){
                System.out.println(s7[i]);
            }*/
            //for each循环
            for (String s8:s7){
                System.out.println(s8);
            }
            input.close();
        }
    }
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  • 原文地址:https://www.cnblogs.com/xiaolei121/p/5761629.html
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