Java實用類小練習

package ArrayTest;

import java.util.Random;

public class TEST {
    static int and;
    static int and1;
    static int Sand;
    static int c;

    public static void main(String[] args) {
        // 內容1
        Integer i = new Integer(25);
        System.out.println(i.intValue());
        // 內容2
        Character c1 = new Character('A');
        Character c2 = new Character('B');
        System.out.println("char大寫類型" + c1.equals(c2));
        c1.toLowerCase(c1);
        c2.toLowerCase(c2);
        System.out.println("char小寫類型" + c1.equals(c2));
        // 內容3
        String booleans = "boolean";
        Boolean boo = new Boolean(booleans);
        String str = boo.toString();
        System.out.println("Boolean類型轉換String類型是否等於原來" + str.equals(booleans));
        // 內容4
        Random ran = new Random();
        for (int j = 0; j < 6; j++) {
            int intv = ran.nextInt(30) + 1;
            if (intv % 2 != 0) {
                c = intv + 1;
                System.out.println(c);
                and += c;
            } else {
                System.out.println(intv);
                and1 += intv;
            }
            Sand = and + and1;
        }
        System.out.println("偶數總和:"+Sand);
        //內容5
        double r=5;
        double and1=(r*r)*Math.PI;
        String And=Double.toString(and1);
        System.out.println("圓面積保留5位小數:"+And.format("%.5f",and1 ));
    }
}