I learned about Java this time.
I was studying hashmap, but I wondered if I could put the key value as a repeating sentence.
public static void main(String[] args)
{
HashMap<string, Integer> map1 = new HashMap<String, Integer>();
for(int i =0; i<100; i++)
{
map1.put("i",i+1);
}
System.out.println(map1);
}
I did it like this The result is also (1,100). That's all.
Can't you do the string by turning the repetition sentence ++1 each?
The price I want is (1,1) (2,2) (3,3) .... (100, 100) is taken on the console.
If I try to put the key one by one, it takes too long, so is there a good way?
Thank you for your interest.
java hashmap key
I don't understand the code. I turn the repeated door 100 times and put() on the map, but the key is always the same, so 99 times is overwritten.
public static void main(String[] args) {
Map<String, Integer> map = new HashMap<>();
for (int i = 0; i < 100; i++) {
map.put(String.valueOf(i), i++);
}
System.out.println(map);
}
Is this what you want?
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