Check If It Is a Straight Line LeetCode solution in Java

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class Solution {
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  public boolean checkStraightLine(int[][] coordinates) {
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    int x1 = coordinates[0][0];
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    int y1 = coordinates[0][1];
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    int x2 = coordinates[1][0];
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    int y2 = coordinates[1][1];
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    float slope;
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    if (x2 - x1 == 0) {
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      slope = Integer.MAX_VALUE;
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    } else {
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      slope = (y2 - y1) / (float) (x2 - x1);
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    }
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    for (int i = 0; i < coordinates.length; i++) {
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      for (int j = 0; j < 2; j++) {
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        if (slope == Integer.MAX_VALUE) {
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          if (coordinates[i][0] != x1) return false;
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        } else {
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          int y = coordinates[i][1];
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          int x = coordinates[i][0];
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          if ((float) (y - y1) != slope * (x - x1)) return false;
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        }
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      }
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    }
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    return true;
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  }
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}