How to remove and update the string array in java

Question

Code:

String[] myStringArray = {"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};

String input = "Monday"

Output:

String[] newInput = {"Tuesday","Wednesday","Thursday","Friday","Saturday"};

So how to remove the specific input to update in array in java?

Arrays are fixed size. So unless you want to replace the elements that match your input with "null" you need to create a new array where you only add those elements that don't match the input. — OH GOD SPIDERS, Jan 11 '18 at 15:29

score 1 · Accepted Answer · answered Jan 11 '18 at 15:40

1

Just try this:

public static void main(final String[] args) {
    String[] myStringArray = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
    String input = "Monday";
    String[] output = Arrays.stream(myStringArray).filter(e -> !e.equals(input)).toArray(String[]::new);
    System.out.println(Arrays.toString(output));
}

answered Jan 11 '18 at 15:40

Christoph Lembeck

54
2

thanks. let me try. – Star Jan 11 '18 at 15:42
may i know what is e? – Star Jan 11 '18 at 15:43
`e` is an item from the stream, in this case, each one of your Strings. – SurfMan Jan 11 '18 at 15:51
e is the input variable of the "lambda expression" for the Predicate inside the filter method. – Christoph Lembeck Jan 11 '18 at 15:52

score 0 · Answer 2 · answered Jan 11 '18 at 15:46

String[] myStringArray = {"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
String input = "Monday";
String[] newInput = new String[5];
int j = 0;
for(int i=0; i< myStringArray.length; i++)
{
  if(!myStringArray[i].equals(input))
     {
       newInput[j] = myStringArray[i];
       j++;
     }
}

The really horrible piece of code, but I hope it helps - I kept it as simple as possible.

How to remove and update the string array in java

2 Answers2