T1153

蒜术师给了你一个 1010 个整数的序列，要求对其重新排序。排序要求:

奇数在前，偶数在后；

奇数按从大到小排序；

偶数按从小到大排序。

解析：使用 ArrayList 存储奇数数据和偶数数据 调用 Collections 中的sort(List，Comparator) 根据指定的比较器对List进行排序

package com.java3;import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Scanner;public class T1153 {public static void main(String[] args) {Scanner scan = new Scanner(System.in);ArrayList<Integer> oddList = new ArrayList<>();ArrayList<Integer> evenList = new ArrayList<>();for(int i = 0; i < 10;i++){int temp = scan.nextInt();if(temp % 2 == 0){evenList.add(temp);}else{oddList.add(temp);}}//奇数按从大到小排序Collections.sort(oddList, new Comparator<Integer>() {@Overridepublic int compare(Integer o1, Integer o2) {return -(o1 - o2);}});//偶数按从小到大排序Collections.sort(evenList, new Comparator<Integer>() {@Overridepublic int compare(Integer o1, Integer o2) {return o1 - o2;}});for(int i = 0; i < oddList.size();i++){System.out.print(oddList.get(i) + " ");}for(int i = 0; i < evenList.size();i++){System.out.print(evenList.get(i) + " ");}}
}

4 7 3 13 11 12 0 47 34 98
47 13 11 7 3 0 4 12 34 98 

T1121

输入一行单词序列，相邻单词之间由 1 个或多个空格间隔，请对应地计算各个单词的长度。

注意，如果有标点符号（如连字符，逗号，句号），标点符号算作与之相连的词的一部分。没有被空格间隔开的符号串，都算作单词。

解析：使用scan.nextLine() 接受这一行单词序列，使用split(" \\s+ ")对单词序列进行分割 使用ArrayList接受每个分割部分返回的长度

package com.java3.ch3;import java.util.ArrayList;
import java.util.Scanner;public class T1121 {public static void main(String[] args) {Scanner scan = new Scanner(System.in);String sentence = scan.nextLine();String [] arrayStr = sentence.split("\\s+");ArrayList strLength = new ArrayList();for(int i = 0;i < arrayStr.length;i++){strLength.add(arrayStr[i].length());}for(int i  = 0;i < strLength.size();i++){if(i ==  strLength.size() - 1){System.out.print(strLength.get(i));}else{System.out.print(strLength.get(i) + ",");}}}
}

She was born in 1990-01-02  and  from Beijing city.
3,3,4,2,10,3,4,7,5

T1154

蒜头君和朋友们去爬香山，为美丽的景色所陶醉，想合影留念。如果他们站成一排，男生全部在左（从拍照者的角度），并按照从矮到高的顺序从左到右排，女生全部在右，并按照从高到矮的顺序从左到右排，请问他们合影的效果是什么样的（所有人的身高都不同）?

艹，数据接收不进去

2021-5-4:之前测试测错了

package com.java3.ch3;import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Scanner;public class T1154 {public static void main(String[] args) {Scanner scan = new Scanner(System.in);ArrayList<Double> maleList = new ArrayList<>();ArrayList<Double> femaleList = new ArrayList<>();//数据接收int amount = scan.nextInt();//scan.nextLine();for(int i = 0;i < amount;i++){String gender = scan.next();double height = scan.nextDouble();if(gender.equals("male")){maleList.add(height);}else{femaleList.add(height);}}//测试数据接收
//        for(Double temp:maleList){
//            System.out.println("male's height is " + temp);
//        }
//        for(Double temp:femaleList){
//            System.out.println("female's height is " + temp);
//        }//使用 Collections.sort()对List进行排序//失误了, new Comparator() 需要返回整数 输入的是浮点型我还没有想出来怎么做
//        Collections.sort(maleList, new Comparator<Double>() {
//            @Override
//            public int compare(Double o1, Double o2) {
//                return (int)(o1 - o2)*100;
//            }
//        });
//
//        Collections.sort(femaleList, new Comparator<Double>() {
//            @Override
//            public int compare(Double o1, Double o2) {
//                return (int)(o2 - o1)*100;
//            }
//        });//使用冒泡排序对集合进行排序//maleList 从矮到高for(int i = 0;i < maleList.size();i++){for(int j = 0;j < maleList.size() - 1 - i;j++){if(maleList.get(j) > maleList.get(j + 1)){Double temp = maleList.get(j);maleList.set(j,maleList.get(j + 1));maleList.set(j + 1,temp);}}}//femaleList 从高到矮for(int i = 0;i < femaleList.size();i++){for(int j = 0;j < femaleList.size() - 1 - i;j++){if(femaleList.get(j) < femaleList.get(j + 1)){Double temp = femaleList.get(j);femaleList.set(j,femaleList.get(j + 1));femaleList.set(j + 1,temp);}}}//输出数据 保留两位小数for(Double temp:maleList){System.out.print(String.format("%.2f",temp) + " ");}for(Double temp:femaleList){System.out.print(String.format("%.2f",temp) + " ");}}
}

6
male 1.72
male 1.78
female 1.61
male 1.65
female 1.70
female 1.56
1.65 1.72 1.78 1.70 1.61 1.56 

计蒜客网址

直达链接