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                ## 方法的重載:overload * 定義:方法名相同,參數列表不同,參數類型不用,稱為方法的重載 ``` public static int sum(int a,int b){ return a+b; } //sum方法的重載 public static int sum(int a,int b,int c){ //參數列表不同 return a+b+c; } public static int sum(double a,int b){ //參數類型不同 return (int) (a+b); } public static void main(String[] args) { //sum方法的調用,會根據你傳入的參數類型和列表進行自動匹配相應的sum方法 int s1=sum(1,2); int s2=sum(1,2,3); int s3=sum(3.1,3); System.out.println(s1); System.out.println(s2); System.out.println(s3); } ``` ## 方法的重寫:override 方法名相同,參數列表和參數類型都相同,只有方法體不同,稱為方法的重寫 方法的重寫只能發生在繼承關系中
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