[JAVA]36.String

package ex04;

public class Str02 {
    public static void main(String[] args) {
        //""" 여러줄 쓸때
        String nums = """
                031)533-2112,
                02)223-2234,
                02)293-4444,
                051)398-3434,
                02)498-3434,
                051)398-3434,
                043)3222-3434
                """;

        int count = 0;

        // 부산에 사는 고객은 몇명인가요? 051에서


        // 1. split(,)로 String[] splitNums[]로 옮기기
        String[] splitNums = nums.split(",");
        
        System.out.println(splitNums[0]);
        System.out.println(splitNums[1]);
        System.out.println(splitNums[2]);
        System.out.println(splitNums[3]);
        System.out.println(splitNums[4]);
        System.out.println(splitNums[5]);
        System.out.println(splitNums[6]);

        // 1-1 공백 없애기
        splitNums[0] = splitNums[0].trim();
        splitNums[1] = splitNums[1].trim();
        splitNums[2] = splitNums[2].trim();
        splitNums[3] = splitNums[3].trim();
        splitNums[4] = splitNums[4].trim();
        splitNums[5] = splitNums[5].trim();
        splitNums[6] = splitNums[6].trim();


        // 2-1 splitNums[] for문 돌면서 indexOf(")") 위치 찾기
        System.out.println(splitNums[0].indexOf(")"));
        System.out.println(splitNums[1].indexOf(")"));
        System.out.println(splitNums[2].indexOf(")"));
        System.out.println(splitNums[3].indexOf(")"));
        System.out.println(splitNums[4].indexOf(")"));
        System.out.println(splitNums[5].indexOf(")"));
        System.out.println(splitNums[6].indexOf(")"));

        // 2-2 substring으로 지역번호 추출
        System.out.println(splitNums[0].substring(0, splitNums[0].indexOf(")")));
        System.out.println(splitNums[1].substring(0, splitNums[1].indexOf(")")));
        System.out.println(splitNums[2].substring(0, splitNums[2].indexOf(")")));
        System.out.println(splitNums[3].substring(0, splitNums[3].indexOf(")")));
        System.out.println(splitNums[4].substring(0, splitNums[4].indexOf(")")));
        System.out.println(splitNums[5].substring(0, splitNums[5].indexOf(")")));
        System.out.println(splitNums[6].substring(0, splitNums[6].indexOf(")")));

        // 2-3지역번호만 newNums[]로 옮기기
        String[] newNums = splitNums[0].substring(0, splitNums[0].indexOf(")")).split(",");
        String[] newNums1 = splitNums[1].substring(0, splitNums[1].indexOf(")")).split(",");
        String[] newNums2 = splitNums[2].substring(0, splitNums[2].indexOf(")")).split(",");
        String[] newNums3 = splitNums[3].substring(0, splitNums[3].indexOf(")")).split(",");
        String[] newNums4 = splitNums[4].substring(0, splitNums[4].indexOf(")")).split(",");
        String[] newNums5 = splitNums[5].substring(0, splitNums[5].indexOf(")")).split(",");
        String[] newNums6 = splitNums[6].substring(0, splitNums[6].indexOf(")")).split(",");


        System.out.println("newNums= " + newNums[0]);
        System.out.println("newNums= " + newNums1[0]);
        System.out.println("newNums= " + newNums2[0]);
        System.out.println("newNums= " + newNums3[0]);
        System.out.println("newNums= " + newNums4[0]);
        System.out.println("newNums= " + newNums5[0]);
        System.out.println("newNums= " + newNums6[0]);

        // 3-1 newNums[] for문 돌면서 051 지역번호를 equals로 확인
        System.out.println("equals = " + "051".equals(newNums[0]));
        System.out.println("equals = " + "051".equals(newNums1[0]));
        System.out.println("equals = " + "051".equals(newNums2[0]));
        System.out.println("equals = " + "051".equals(newNums3[0]));
        System.out.println("equals = " + "051".equals(newNums4[0]));
        System.out.println("equals = " + "051".equals(newNums5[0]));
        System.out.println("equals = " + "051".equals(newNums6[0]));
        


        // 3-1다른방법 contains로 확인하여
        System.out.println("contains = " + (newNums[0].contains("051")));
        System.out.println("contains = " + (newNums1[0].contains("051")));
        System.out.println("contains = " + (newNums2[0].contains("051")));
        System.out.println("contains = " + (newNums3[0].contains("051")));
        System.out.println("contains = " + (newNums4[0].contains("051")));
        System.out.println("contains = " + (newNums5[0].contains("051")));
        System.out.println("contains = " + (newNums6[0].contains("051")));

        //3-3 고객수를 int count변수에 누적
        if (newNums[0].contains("051")) {
            count++;
        }
        if (newNums1[0].contains("051")) {
            count++;
        }
        if (newNums2[0].contains("051")) {
            count++;
        }
        if (newNums3[0].contains("051")) {
            count++;
        }
        if (newNums4[0].contains("051")) {
            count++;
        }
        if (newNums5[0].contains("051")) {
            count++;
        }
        if (newNums6[0].contains("051")) {
            count++;
        }

        // 4. count 변수 출력
        System.out.println("부산에 사는 고객은 " + count + "명입니다");
        System.out.println(count);
    }
}

package ex04;

public class Str02 {
    public static void main(String[] args) {
        //""" 여러줄 쓸때
        String nums = """
                031)533-2112,
                02)223-2234,
                02)293-4444,
                051)398-3434,
                02)498-3434,
                051)398-3434,
                043)3222-3434
                """;

        int count = 0;

        // 부산에 사는 고객은 몇명인가요? 051에서


        // 1. split(,)로 String[] splitNums[]로 옮기기
        String[] splitNums = nums.split(",");

        for (int i = 0; i < splitNums.length; i++) {
            // 1-1 공백 없애기
            splitNums[i] = splitNums[i].trim();
            System.out.println(splitNums[i]);
            // 2-1 splitNums[] for문 돌면서 indexOf(")") 위치 찾기
            System.out.println(splitNums[i].indexOf(")"));
            // 2-2 substring으로 지역번호 추출
            System.out.println(splitNums[i].substring(0, splitNums[i].indexOf(")")));
            // 2-3지역번호만 newNums[]로 옮기기
            String[] newNums = splitNums[i].substring(0, splitNums[i].indexOf(")")).split(",");
            System.out.println("newNums= " + newNums[0]);
            // 3-1 newNums[] for문 돌면서 051 지역번호를 equals로 확인
            System.out.println("equals = " + "051".equals(newNums[0]));
            // 3-1 다른방법 contains로 확인하여
            System.out.println("contains = " + (newNums[0].contains("051")));
            //3-3 고객수를 int count변수에 누적
            if (newNums[0].contains("051")) {
                count++;
            }
        }
        // 4. count 변수 출력
        System.out.println("부산에 사는 고객은 " + count + "명입니다");
    }
}