以下这段代码应该怎么优化:private void right() { Enum direction = location.getDirection(); if (Direction.North.equals(direction)) { location.setDirection(Direction.East); } else if(Direction.South.equals(direction)) { location.setDirection(Direction.West); } else if (Direction.East.equals(direction)) { location.setDirection(Direction.South); } else { location.setDirection(Direction.North); } } private void left() { Enum direction = location.getDirection(); if (Direction.North.equals(direction)) { location.setDirection(Direction.West); } else if (Direction.South.equals(direction)) { location.setDirection(Direction.East); } else if (Direction.East.equals(direction)) { location.setDirection(Direction.North); } else { location.setDirection(Direction.South); } } private void move() { Enum direction = location.getDirection(); if (direction.equals(Direction.North)) { location.setCoordinateY(location.getCoordinateY() + 1); } else if (direction.equals(Direction.South)) { location.setCoordinateY(location.getCoordinateY() - 1); } else if (direction.equals(Direction.East)) { location.setCoordinateX(location.getCoordinateX() + 1); } else { location.setCoordinateX(location.getCoordinateX() - 1); } }
时间: 2024-04-14 15:27:57 浏览: 20
这段代码可以进行如下优化:
1. 使用 switch-case 语句替代多个 if-else if-else 语句,提高代码的可读性和执行效率。
```java
private void right() {
Enum direction = location.getDirection();
switch (direction) {
case North:
location.setDirection(Direction.East);
break;
case South:
location.setDirection(Direction.West);
break;
case East:
location.setDirection(Direction.South);
break;
default:
location.setDirection(Direction.North);
break;
}
}
private void left() {
Enum direction = location.getDirection();
switch (direction) {
case North:
location.setDirection(Direction.West);
break;
case South:
location.setDirection(Direction.East);
break;
case East:
location.setDirection(Direction.North);
break;
default:
location.setDirection(Direction.South);
break;
}
}
private void move() {
Enum direction = location.getDirection();
switch (direction) {
case North:
location.setCoordinateY(location.getCoordinateY() + 1);
break;
case South:
location.setCoordinateY(location.getCoordinateY() - 1);
break;
case East:
location.setCoordinateX(location.getCoordinateX() + 1);
break;
default:
location.setCoordinateX(location.getCoordinateX() - 1);
break;
}
}
```
2. 可以考虑使用枚举类的方法来实现方向的切换,使代码更简洁和易读。
```java
enum Direction {
North {
@Override
public Direction getRight() {
return East;
}
@Override
public Direction getLeft() {
return West;
}
@Override
public int moveX() {
return 0;
}
@Override
public int moveY() {
return 1;
}
},
South {
@Override
public Direction getRight() {
return West;
}
@Override
public Direction getLeft() {
return East;
}
@Override
public int moveX() {
return 0;
}
@Override
public int moveY() {
return -1;
}
},
East {
@Override
public Direction getRight() {
return South;
}
@Override
public Direction getLeft() {
return North;
}
@Override
public int moveX() {
return 1;
}
@Override
public int moveY() {
return 0;
}
},
West {
@Override
public Direction getRight() {
return North;
}
@Override
public Direction getLeft() {
return South;
}
@Override
public int moveX() {
return -1;
}
@Override
public int moveY() {
return 0;
}
};
public abstract Direction getRight();
public abstract Direction getLeft();
public abstract int moveX();
public abstract int moveY();
}
private void right() {
location.setDirection(location.getDirection().getRight());
}
private void left() {
location.setDirection(location.getDirection().getLeft());
}
private void move() {
location.setCoordinateX(location.getCoordinateX() + location.getDirection().moveX());
location.setCoordinateY(location.getCoordinateY() + location.getDirection().moveY());
}
```
这样优化后的代码更加简洁和易于理解,同时也提高了性能。