http://www.codedata.com.tw/book/java-basic-source/ch11-2.htm
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public class SimpleAdder{
public int sumOf(int... params){
int sum = 0;
for (int i = 0; i < params.length; i++){
sum = sum + params[i];
}
return sum;
}
public static void main(String[] args){
SimpleAdder adder = new SimpleAdder();
System.out.print("1+2+3=");
System.out.print("1+2+3+4=");
System.out.print("1+2=");
System.out.println(adder.sumOf(1, 2));
System.out.println(adder.sumOf(1, 2, 3));
System.out.println(
adder.sumOf(1, 2, 3, 4));
}}
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