java 将英文语句首字母进行大写 （如将this is a test 转化为This Is A Test）

package lianxi.Demo;

import java.util.Scanner;

/**
 * 如将this is a test 转化为This Is A Test
 */
public class Demo
{
public static void main(String[] args)
{
    Scanner sc = new Scanner(System.in);
    System.out.println("请输入一句英语句型：");
    String str= sc.nextLine();
    System.out.println("原句型："+str);
    char c[] = new char[str.length()];
    str.getChars(0, str.length(), c, 0);
    if (c[0] >= 'a' && c[0] <= 'z') {
        c[0] = (char) (c[0] - 32);
    }
    for (int i = 1; i <= c.length - 1; i++) {
        if (c[i] == ' ') {
            c[i + 1] = (char) (c[i + 1] - 32);
        }
    }
    str = new String(c);
    System.out.print("转换后的句型："+str);
}

}