Favor Enums Over Integer Constants

​ ​class​ CruiseControl {
» ​static​ ​final​ ​int​ STOP_PRESET = 0;
​  ​static​ ​final​ ​int​ PLANETARY_SPEED_PRESET = 1;
​  ​static​ ​final​ ​int​ CRUISE_SPEED_PRESET = 2;
​ 
» ​static​ ​final​ ​double​ STOP_SPEED_KMH = 0;
​  ​static​ ​final​ ​double​ PLANETARY_SPEED_KMH = 7667;
​  ​static​ ​final​ ​double​ CRUISE_SPEED_KMH = 16944;
​ 
​  ​private​ ​double​ targetSpeedKmh;
​ 
» ​void​ setPreset(​int​ speedPreset) {
​  ​if​ (speedPreset == CRUISE_SPEED_PRESET) {
​  setTargetSpeedKmh(CRUISE_SPEED_KMH);
​  } ​else​ ​if​ (speedPreset == PLANETARY_SPEED_PRESET) {
​  setTargetSpeedKmh(PLANETARY_SPEED_KMH);
​  } ​else​ ​if​ (speedPreset == STOP_PRESET) {
​  setTargetSpeedKmh(STOP_SPEED_KMH);
​  }
​  }
​ 
​  ​void​ setTargetSpeedKmh(​

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