package delete;

import java.util.ArrayList;
import java.util.List;


public class deleteaa {
    public static void main(String [] args) {  
        testA();  
        System.out.println("");}
    public static void testA() {  
        String [] str = {"1", "2", "6", "2", "6", "7", "1"};  
        for (String elementA:str ) {  
            System.out.print(elementA + " ");  
        }  
        List<String> list = new ArrayList<String>();  
        for (int i=0; i<str.length; i++) {  
            if(!list.contains(str[i])) {  
                list.add(str[i]);  
            }  
        }  
        /*
        Set<String> set = new HashSet<String>();
        for (int i=0; i<str.length; i++) {
            set.add(str[i]);
        }
        String[] newStr =  set.toArray(new String[1]);  
        */  
        System.out.println();  
        String[] newStr =  list.toArray(new String[1]); //返回一个包含所有对象的指定类型的数组   
        for (String elementB:newStr ) {  
            System.out.print(elementB + " ");  
        }  
        System.out.println();  
    }   
}
谁能帮忙详细说明下各个步骤