toString()
自訂 Box 類別，覆寫 toString()，可以輸出有用的資訊，而不再是 Box@1fb8ee3。
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| public class Box {
private int width;
private int height;
public Box(int width, int height) {
this.width = width;
this.height = height;
}
@Override
public String toString() {
return "寬:" + width + "px, 高:" + height + "px";
}
public static void main(String[] args) {
Box box = new Box(100, 50);
System.out.println(box.toString());
}
}
|