把一段话的每个首字母大写，substring,spilt,length,length(),size()，substringspilt

把一段话的每个首字母大写，substring,spilt,length,length(),size()，substringspilt

package test;
import java.util.Scanner;

public class LianXi {
    //把一段话的每个首字母大写
    public static void main(String[] args) {

        System.out.println("Please input a english sentence:");
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        String[] lists = s.split(" ");

        for (int i = 0; i < lists.length; i++) {
            lists[i] = lists[i].substring(0, 1).toUpperCase() + lists[i].substring(1);
            System.out.print(lists[i] + " ");
        }
//        LianXi.test();        //split方法limit参数测试
    }

    public static void test() {
        String s = "boobooboo";
        for (String a : s.split("o", 2)) {          //匹配1次，分成2段
            System.out.print("|_" + a + "_| ");
        }
        System.out.println();
        for (String a : s.split("o", 8)) {          //匹配7次，要分成8段，只有7段
            System.out.print("|_" + a + "_| ");
        }
        System.out.println();
        for (String a : s.split("o", 0)) {          //匹配所有次，去除结尾空格
            System.out.print("|_" + a + "_| ");
        }
        System.out.println();
        for (String a : s.split("o", -2)) {          //匹配所有次
            System.out.print("|_" + a + "_| ");
        }
        System.out.println();
        for (String a : s.split("o", -8)) {          //匹配所有次
            System.out.print("|_" + a + "_| ");
        }
    }
/*
|_b_| |_obooboo_| 
|_b_| |__| |_b_| |__| |_b_| |__| |__| 
|_b_| |__| |_b_| |__| |_b_| 
|_b_| |__| |_b_| |__| |_b_| |__| |__| 
|_b_| |__| |_b_| |__| |_b_| |__| |__| 
 */

}

/*
String  substring(int beginIndex)
Returns a string that is a substring of this string.
String  substring(int beginIndex, int endIndex)
Returns a string that is a substring of this string.

String[]    split(String regex)
Splits this string around matches of the given regular expression.
String[]    split(String regex, int limit)
Splits this string around matches of the given regular expression.

limit 大于0 匹配 limit-1次,保证最后匹配
limit 等于0 无限次匹配，去除最后多余空格
limit 小于0 无限次匹配
*/


/*
length      数组对象使用           String[]
length()    字符串对象使用         String
size()      泛型集合对象使用        List
 */