import java.util.ArrayList;
public class ArrayAndList<E> {
public static void main(String[] args) {
int[][] b= {{1,2}, {2,3,4,5}};
ArrayList<ArrayList<Integer>> list = toList(b);
for(ArrayList<Integer> subList : list) {
for(Integer iObj : subList) {
System.out.println(iObj);
}
}
int[][] list1 = toArray(list);
for(int[] subList : list1) {
for(int i : subList) {
System.out.println(i);
}
}
}
public static ArrayList<ArrayList<Integer>> toList(int[][]a){
ArrayList<ArrayList<Integer>> l1=new ArrayList<ArrayList<Integer>>();
for(int[]b:a){
ArrayList<Integer> l2=new ArrayList<Integer>();
for(int c:b){
l2.add(c);
}
l1.add(l2);
}
return l1;
}
public static int[][] toArray(ArrayList<ArrayList<Integer>> l){
int k=0;
for (ArrayList<Integer> l1:l){
k++;
}
int[]j=new int[k-1];
k=0;
for (ArrayList<Integer> l1:l){
for(Integer obj:l1){
j[k]+=1;
}
k++;
}
//
int[][] result=new int[k-1][];
k=0;
for (ArrayList<Integer> l1:l){
result[k]=new int[j[k]-1];
int i=0;
for(Integer obj:l1){
result[k][i]=obj;
i++;
}
k++;
}
return result;
}
}
public class ArrayAndList<E> {
public static void main(String[] args) {
int[][] b= {{1,2}, {2,3,4,5}};
ArrayList<ArrayList<Integer>> list = toList(b);
for(ArrayList<Integer> subList : list) {
for(Integer iObj : subList) {
System.out.println(iObj);
}
}
int[][] list1 = toArray(list);
for(int[] subList : list1) {
for(int i : subList) {
System.out.println(i);
}
}
}
public static ArrayList<ArrayList<Integer>> toList(int[][]a){
ArrayList<ArrayList<Integer>> l1=new ArrayList<ArrayList<Integer>>();
for(int[]b:a){
ArrayList<Integer> l2=new ArrayList<Integer>();
for(int c:b){
l2.add(c);
}
l1.add(l2);
}
return l1;
}
public static int[][] toArray(ArrayList<ArrayList<Integer>> l){
int k=0;
for (ArrayList<Integer> l1:l){
k++;
}
int[]j=new int[k-1];
k=0;
for (ArrayList<Integer> l1:l){
for(Integer obj:l1){
j[k]+=1;
}
k++;
}
//
int[][] result=new int[k-1][];
k=0;
for (ArrayList<Integer> l1:l){
result[k]=new int[j[k]-1];
int i=0;
for(Integer obj:l1){
result[k][i]=obj;
i++;
}
k++;
}
return result;
}
}
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