題目：字串排序。 

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test40 {
	
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		ArrayList<String> arrayList = new ArrayList<>();
		int i = 0;
		String str = "";
		System.out.println("請輸出字串（回車下一組，輸入stop則停止輸入）：");
		while(s.hasNext()){
			str = s.nextLine();
			if(!str.equalsIgnoreCase("stop")){
				arrayList.add(str);
			}else{
				break;
			}
			
		}
		
		System.out.println("您輸入的順序為：");
		System.out.println(arrayList.toString());
		System.out.println("排序：");
		stringSort(arrayList);
		
	}

	private static void stringSort(ArrayList<String> arrList) {

		ArrayList<String> arrayList1 = new ArrayList<>();
		ArrayList<String> arrayList2 = new ArrayList<>();
		
		//選擇排序法
		for(int i=0; i<arrList.size()-1; i++){
			for(int j=i; j<arrList.size(); j++){
				if(arrList.get(i).compareTo(arrList.get(j)) > 0 ){
					swap(arrList,i,j);
					
				}
			}
		}
		System.out.println(arrList.toString());
		
	}
	
	//陣列交換位置
	private static void swap(ArrayList<String> arr, int i , int j ){
		String strTmp = (String) arr.get(i);
		arr.set(i,arr.get(j) );
		arr.set(j, strTmp);
	}
	

}
 

請輸出字串（回車下一組，輸入stop則停止輸入）：
dsfg
sgd
fhfhfrc
cfg
zsdwefc
abced
stop
您輸入的順序為：
[dsfg, sgd, fhfhfrc, cfg, zsdwefc, abced]
排序：
[abced, cfg, dsfg, fhfhfrc, sgd, zsdwefc]