LCM_Sum.java

/**
LCM_Sum.java
複数の最小公倍数の積を求める
Java program to calculate the product of multiple least common multiples.
**/

import java.util.ArrayList;

public class LCM_Sum {
    public static void main(String[] args) {
        int valueLCM = 0;
        ArrayList<Integer> list = new ArrayList<>();
	// TODO さらに複数の値にも対応できそう
        list.add(2022);
        list.add(3);
        list.add(22);

        for(int index=0; index<list.size()-1; index++) {
            if( index==0 ) {
                valueLCM = calcLCM( list.get(index), list.get(index+1) );
            } else {
                valueLCM = calcLCM( valueLCM,        list.get(index+1) );
            }
        }
        System.out.println(valueLCM);
    }

    private static int calcLCM(int val1, int val2) {
        int maxValue = Math.max(val1, val2);
        int minValue = Math.min(val1, val2);
        long val3    = maxValue * minValue;

        if(minValue==0) return maxValue;

        int temp;
        while( (temp=maxValue%minValue)!=0 ) {
            maxValue=minValue;
            minValue=temp;
        }

        return (int)(val3/minValue);
    }
	
	// Thanks
	// https://qiita.com/ffstarter/items/58a716bff5e5846fde96
	// https://www.jdoodle.com/online-java-compiler/
    
}

a little edit

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