C++ Vector push_back()

v.push_back(k)

#include<iostream>
#include<vector>
using namespace std;
int main()
{
    vector<char> v;
    v.push_back('j');
    v.push_back('a');
    v.push_back('v');
    v.push_back('a');
    for(int i=0;i<v.size();i++)
    cout<<v[i];
    return 0;
}

java