How to sort input words by first letter in java

Question:

Sort the given series of English words by first letter and output the sorted results.

Such a method in StringcompareToIgnoreCase()It ignores case and compares the order of two words in the dictionary. By using this method, this problem can be easily solved.

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The following is the demo code:

import java.util.Scanner;
/*
 * 请对给出的一系列英文单词按首字母进行排序，并输出排序后的结果。
		输入说明：数字N，表明单词数，接下来是N个英文单词；
		输出说明：按字母序的排序结果。
		输入样例：6
		Apple  banana  Zebra  Tuesday  moon  CAN
		输出样例：Apple
		  banana
		CAN  
		moon  
		Tuesday  
		Zebra
 */
public class Sort {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println("请输入单词的个数：");
		int num = input.nextInt();
		String[] strArr = new String[num];
		System.out.println("请输入单词：");
		for(int i = 0;i < strArr.length;i++) {
			strArr[i] = input.next();
		}//将键盘输入的单词输入到String数组中
		wordSort(strArr);
	}
	public static void wordSort(String[] strArr) {
	//比较单词字典顺序  用冒泡排序法比较
		for(int i = strArr.length - 1;i > 0;i--) {
			for(int j = 0;j < i;j++) {  
				if(strArr[j].compareToIgnoreCase(strArr[j + 1]) > 0) {
					String temp = strArr[j];
					strArr[j] = strArr[j + 1];
					strArr[j + 1] = temp;
				}
			}
		}
	for(String i : strArr) {
		System.out.println(i);
	}
}
}

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