求助贴,关于方法重载 来自学习Java的新手小白题目:计算两个数的乘积,要求使用方法重载。我用int和double两两匹配定义了四个sum方法,但是在main方法中键盘输入时怎么编写呢,键盘输入也有四种情况诶。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 定义int类型接收,然后类型转换一下就可以,没你想的那么复杂public static void main(String[] args) { @SuppressWarnings("resource") Scanner in = new Scanner(System.in); System.out.println("请输第一个数"); int one = in.nextInt(); System.out.println("请输第二个数"); int two = in.nextInt(); double oneD = one; double twoD = two; sum(one,two); sum(one,twoD); sum(oneD,two); sum(oneD,twoD);}public static void sum(int one,int two){ System.out.println("调用了第一个方法,结果为:"+one*two);}public static void sum(int one,double two){ System.out.println("调用了第二个方法,结果为:"+one*two);}public static void sum(double one,int two){ System.out.println("调用了第三个方法,结果为:"+one*two);}public static void sum(double one,double two){ System.out.println("调用了第四个方法,结果为:"+one*two);} package test;public class Mutiply { public static void main(String[] args) { int rs1= mutiply(1,2); System.out.println(rs1); double rs2=mutiply(2,3); System.out.println(rs2); double rs3=mutiply(3,3); System.out.println(rs3); double rs4=mutiply(4,3); System.out.println(rs4); } public static int mutiply(int x,int y) { return x*y; } public static double mutiply(int x,double y) { return x*y; } public static double mutiply(double x,double y) { return x*y; } public static double mutiply(double x,int y) { return x*y; }} public class Demo001 {public static void main(String[] args) {Scanner scanner = new Scanner(System.in); String nextLine = scanner.nextLine(); String[] split = nextLine.split(","); String s = split[0]; String s2 = split[1]; if (s.contains(".") && s2.contains(".")) sum(Double.valueOf(s), Double.valueOf(s2)); else if (s.contains(".") && !s2.contains(".")) sum(Double.valueOf(s), Integer.valueOf(s2)); else if (!s.contains(".") && !s2.contains(".")) sum(Integer.valueOf(s), Integer.valueOf(s2)); else if (!s.contains(".") && s2.contains(".")) sum(Integer.valueOf(s), Double.valueOf(s2));}public static void sum(int one, int two) { System.out.println("调用了第一个方法,结果为:" + one * two); } public static void sum(int one, double two) { System.out.println("调用了第二个方法,结果为:" + one * two); } public static void sum(double one, int two) { System.out.println("调用了第三个方法,结果为:" + one * two); } public static void sum(double one, double two) { System.out.println("调用了第四个方法,结果为:" + one * two); }} httpclient 如何取得下载文件的文件名字的问题 100分求解Interface类型引用的问题 求java写的Linux平台下的文件加密解密程序 为什么获得不到对象? 请问Applet能否调用webservice??????? 一个奇怪的加密问题 (急等)关于全文搜索问题 有没有关swt与jface学习资料 怎么看一个ArrayList对象的容量? 我决定要学习java了,请各位帮忙给点意见 慕课网滴滴打车系统 PC如何远程采集智能电磁式水表的数据
@SuppressWarnings("resource")
Scanner in = new Scanner(System.in);
System.out.println("请输第一个数");
int one = in.nextInt();
System.out.println("请输第二个数");
int two = in.nextInt();
double oneD = one;
double twoD = two;
sum(one,two);
sum(one,twoD);
sum(oneD,two);
sum(oneD,twoD);
}public static void sum(int one,int two){
System.out.println("调用了第一个方法,结果为:"+one*two);
}
public static void sum(int one,double two){
System.out.println("调用了第二个方法,结果为:"+one*two);
}
public static void sum(double one,int two){
System.out.println("调用了第三个方法,结果为:"+one*two);
}
public static void sum(double one,double two){
System.out.println("调用了第四个方法,结果为:"+one*two);
}
int rs1= mutiply(1,2);
System.out.println(rs1);
double rs2=mutiply(2,3);
System.out.println(rs2);
double rs3=mutiply(3,3);
System.out.println(rs3);
double rs4=mutiply(4,3);
System.out.println(rs4);
}
public static int mutiply(int x,int y) {
return x*y;
}
public static double mutiply(int x,double y) {
return x*y;
}
public static double mutiply(double x,double y) {
return x*y;
}
public static double mutiply(double x,int y) {
return x*y;
}
}
public static void main(String[] args) {Scanner scanner = new Scanner(System.in);
String nextLine = scanner.nextLine();
String[] split = nextLine.split(","); String s = split[0];
String s2 = split[1]; if (s.contains(".") && s2.contains("."))
sum(Double.valueOf(s), Double.valueOf(s2)); else if (s.contains(".") && !s2.contains("."))
sum(Double.valueOf(s), Integer.valueOf(s2)); else if (!s.contains(".") && !s2.contains("."))
sum(Integer.valueOf(s), Integer.valueOf(s2)); else if (!s.contains(".") && s2.contains("."))
sum(Integer.valueOf(s), Double.valueOf(s2));
}
public static void sum(int one, int two) {
System.out.println("调用了第一个方法,结果为:" + one * two);
} public static void sum(int one, double two) {
System.out.println("调用了第二个方法,结果为:" + one * two);
} public static void sum(double one, int two) {
System.out.println("调用了第三个方法,结果为:" + one * two);
} public static void sum(double one, double two) {
System.out.println("调用了第四个方法,结果为:" + one * two);
}}