Searching for Y value in an array of point

Hopefully, someone can enlighten me ?
I have an array of point
int[] depth = {25, 30, 35, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190};
int[] minutes = {595, 405, 310, 200, 100, 60, 50, 40, 30, 25, 20, 15, 10, 10, 5, 5, 5, 5, 5};
Point[] points = new Point[depth.length];
for(int i = 0; i < points.length; i++)
points[i] = new Point(depth, minutes[i]);
JTextField tfXvalue = new JTextField();
String getXvalue = tfdepth.getText();
Say the input of getXvalue is 40. Then I do all of the necessary conversions from string to double etc...
I need to tell the program to look in the array, and return the Y value where X=40.
I haven't the slightest idea where to start. !!!!
Would someone please point me in the right direction ?

If the user enters 41 which is not in the array. how
can i say since 41 is not in the array, go to the
next number which will be 50 in this case ?
Help from anyone ?Sort the point array by x values,
If you find the x value, return the y value,
If you pass the x value without finding it, return the next y value.
How to return the fact that the specified value wasn't found depends on your design.

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depending on the size of the sorted array it might be faster if you search for the first match and than look if the next still matches ...
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'
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"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps
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Searching for Y value in an array of point

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