package zh.codegym.task.task10.task1015;
import java.util.ArrayList;
import java.util.Arrays;
/*
字符串列表数组
*/
public class Solution {
public static void main(String[] args) {
ArrayList<String>[] arrayOfStringList = createList();
printList(arrayOfStringList);
}
public static ArrayList<String>[] createList() {
//在此编写你的代码
ArrayList<String>[] list = (ArrayList<String>[]) new ArrayList[generateNumber(2, 5)];
for (int i = 0; i<list.length; i++) {
list[i] = new ArrayList<String>();
}
for (ArrayList<String> item: list) {
for (int j = 0; j<generateNumber(2, 5); j++) {
item.add(generateRandomString(3, 10));
}
}
return list;
}
public static void printList(ArrayList<String>[] arrayOfStringList) {
for (ArrayList<String> list : arrayOfStringList) {
for (String s : list) {
System.out.println(s);
}
}
}
public static String generateRandomString(int min, int max) {
int[] array = generateNumberArray((int) 'a', (int) 'z', (int) (min+Math.random()*(max-min+1)));
StringBuffer string = new StringBuffer();
for (int x: array) {
string.append((char) x);
}
return string.toString();
}
public static int[] generateNumberArray(int min, int max, int len) {
int[] array = new int[len];
for (int i = 0; i<len; i++) {
array[i] = min+((int) (Math.random()*(max-min+1)));
}
return array;
}
public static int generateNumber(int min, int max) {
return (int) (min+Math.random()*(max-min+1));
}
}
结果
要求1错误
createList 方法必须声明并初始化含 ArrayList<String> 元素的数组package zh.codegym.task.task10.task1015;
import java.util.ArrayList;
import java.util.Arrays;
/*
字符串列表数组
*/
public class Solution {
public static void main(String[] args) {
ArrayList<String>[] arrayOfStringList = createList();
printList(arrayOfStringList);
}
public static ArrayList<String>[] createList() {
//在此编写你的代码
ArrayList<String>[] list = (ArrayList<String>[]) new ArrayList[generateNumber(2, 5)];
for (int i = 0; i<list.length; i++) {
list[i] = new ArrayList<String>();
}
for (ArrayList<String> item: list) {
for (int j = 0; j<generateNumber(2, 5); j++) {
item.add(generateRandomString(3, 10));
}
}
return list;
}
public static void printList(ArrayList<String>[] arrayOfStringList) {
for (ArrayList<String> list : arrayOfStringList) {
for (String s : list) {
System.out.println(s);
}
}
}
public static String generateRandomString(int min, int max) {
int[] array = generateNumberArray((int) 'a', (int) 'z', (int) (min+Math.random()*(max-min+1)));
StringBuffer string = new StringBuffer();
for (int x: array) {
string.append((char) x);
}
return string.toString();
}
public static int[] generateNumberArray(int min, int max, int len) {
int[] array = new int[len];
for (int i = 0; i<len; i++) {
array[i] = min+((int) (Math.random()*(max-min+1)));
}
return array;
}
public static int generateNumber(int min, int max) {
return (int) (min+Math.random()*(max-min+1));
}
}