Step1 ゲームタイトルと終了メッセージを表示してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS01.java
package jp.co.f1.superintro.ch08;
public class HighAndLowS01 {
public static void main(String[] args) {
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step2 ランダムな数値を取得して表示してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS02.java
package jp.co.f1.superintro.ch08;
public class HighAndLowS02 {
public static void main(String[] args) {
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
int leftCard = (int)(Math.random()*9)+1;
System.out.println("ランダム数値："+leftCard);
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step3 ランダムな数値をトランプの枠に合わせて表示してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS03.java
package jp.co.f1.superintro.ch08;
public class HighAndLowS03 {
public static void main(String[] args) {
int leftCard = (int)(Math.random()*9)+1;
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println(" [問題表示]");
System.out.println("***** *****");
System.out.println("* * * * *");
System.out.println("* "+leftCard+" * * * *");
System.out.println("* * * * *");
System.out.println("***** *****");
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step4 キーボード入力を利用してHigh or Lowを選択してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS04.java
package jp.co.f1.superintro.ch08;
import java.util.Scanner;
public class HighAndLowS04 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int leftCard = (int)(Math.random()*9)+1;
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println(" [問題表示]");
System.out.println("***** *****");
System.out.println("* * * * *");
System.out.println("* "+leftCard+" * * * *");
System.out.println("* * * * *");
System.out.println("***** *****");
System.out.print(" High or Low ?(h/l)＞");
String select = sc.nextLine();
if(select.equals("h")){
System.out.println(" →Highを選択しました。");
}else{
System.out.println(" →Lowを選択しました。");
}
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step5 隠れた数値を画面に表示してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS05.java
package jp.co.f1.superintro.ch08;
import java.util.Scanner;
public class HighAndLowS05 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int leftCard = (int)(Math.random()*9)+1;
int rightCard = (int)(Math.random()*9)+1;
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println(" [問題表示]");
System.out.println("***** *****");
System.out.println("* * * * *");
System.out.println("* "+leftCard+" * * * *");
System.out.println("* * * * *");
System.out.println("***** *****");
System.out.print(" High or Low ?(h/l)＞");
String select = sc.nextLine();
if(select.equals("h")){
System.out.println(" →Highを選択しました。");
}else{
System.out.println(" →Lowを選択しました。");
}
System.out.println("");
System.out.println(" [結果表示]");
System.out.println("***** *****");
System.out.println("* * * *");
System.out.println("* "+leftCard+" * * "+rightCard+" *");
System.out.println("* * * *");
System.out.println("***** *****");
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step6 隠れた数値と比較してゲーム結果を画面に表示してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS06.java
package jp.co.f1.superintro.ch08;
import java.util.Scanner;
public class HighAndLowS06 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int leftCard = (int)(Math.random()*9)+1;
int rightCard = (int)(Math.random()*9)+1;
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println(" [問題表示]");
System.out.println("***** *****");
System.out.println("* * * * *");
System.out.println("* "+leftCard+" * * * *");
System.out.println("* * * * *");
System.out.println("***** *****");
System.out.print(" High or Low ?(h/l)＞");
String select = sc.nextLine();
if(select.equals("h")){
System.out.println(" →Highを選択しました。");
}else{
System.out.println(" →Lowを選択しました。");
}
System.out.println("");
System.out.println(" [結果表示]");
System.out.println("***** *****");
System.out.println("* * * *");
System.out.println("* "+leftCard+" * * "+rightCard+" *");
System.out.println("* * * *");
System.out.println("***** *****");
String result = null;
if(leftCard < rightCard){
result = "h";
}else if(leftCard > rightCard){
result = "l";
}else{
result = select;
}
if(select.equals(result)){
System.out.println(" →You Win!");
}else{
System.out.println(" →You Lose...");
}
System.out.println("");
System.out.println("--ゲーム終了--");
}
}
Step7 連続挑戦できるように繰り返してみよう
[ソースフォルダ] myproj_super_intro/src
[パッケージ] jp.co.f1.superintro.ch08
[作成] HighAndLowS07.java
package jp.co.f1.superintro.ch08;
import java.util.Scanner;
public class HighAndLowS07 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(true){
int leftCard = (int)(Math.random()*9)+1;
int rightCard = (int)(Math.random()*9)+1;
System.out.println("**************");
System.out.println("* High & Low *");
System.out.println("**************");
System.out.println("");
System.out.println(" [問題表示]");
System.out.println("***** *****");
System.out.println("* * * * *");
System.out.println("* "+leftCard+" * * * *");
System.out.println("* * * * *");
System.out.println("***** *****");
System.out.print(" High or Low ?(h/l)＞");
String select = sc.nextLine();
if(select.equals("h")){
System.out.println(" →Highを選択しました。");
}else{
System.out.println(" →Lowを選択しました。");
}
System.out.println("");
System.out.println(" [結果表示]");
System.out.println("***** *****");
System.out.println("* * * *");
System.out.println("* "+leftCard+" * * "+rightCard+" *");
System.out.println("* * * *");
System.out.println("***** *****");
String result = null;
if(leftCard < rightCard){
result = "h";
}else if(leftCard > rightCard){
result = "l";
}else{
result = select;
}
if(select.equals(result)){
System.out.println(" →You Win!");
}else{
System.out.println(" →You Lose...");
break;
}
System.out.println("");
}
System.out.println("--ゲーム終了--");
}
}