如何检查java字符表除了C或N之外还有其他值吗

我有一个

列表

，我想知道如何检查列表中除了C或N之外是否还有其他值

String sql = "SELECT distinct(CODE_STATUS_TYPE) FROM AMEQPS_REWQUEST.PSFDSS_CR_TB " +
             " WHERE  NBR_CR_KEY != :nbrCrKey";


Query q = em.createNativeQuery(sql).setParameter("nbrCrKey", cdId);
List<Character> codeStatus = (ArrayList<Character>) q.getResultList();

// THIS WILL RETURN ANYTHING W,R,D,C,N 

---

在上述方法中，您将迭代

列表

两次，并检查它是否具有

C

或

N

，但通过使用和，您可以在一次迭代中完成

codeStatus.stream().allMatch(c->c.equals('N') || c.equals('C'));  

---

使用

流

，您可以按如下方式进行操作：

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N'});
        System.out.println(!codeStatus.stream().allMatch(c->c.equals('N') || c.equals('C')));
    }
}

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N','T'});
        if (codeStatus.size()==0){
            System.out.println("The list does not contain any element");
        } else if (codeStatus.size()==1) {
            if(codeStatus.contains('C') || codeStatus.contains('N')) {
                System.out.println("Either 'C' or 'N' exists");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }            
        } else if(codeStatus.size()==2) {
            if (codeStatus.contains('C') && codeStatus.contains('N')) {
                System.out.println("Only 'C' and 'N' exists");
            } else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            }
        }else if (codeStatus.size()>2) {
            if((codeStatus.contains('C') && codeStatus.contains('N'))) {
                System.out.println("Other than 'C' and 'N', some other character(s) exist(s)");
            }else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }           
        }
    }
}

另一次跑步： 导入java.util.array； 导入java.util.List

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N','T'});
        System.out.println(!codeStatus.stream().allMatch(c->c.equals('N') || c.equals('C')));
    }
}

如果您不想使用

流

，可以按如下方式执行：

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N'});
        System.out.println(!codeStatus.stream().allMatch(c->c.equals('N') || c.equals('C')));
    }
}

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N','T'});
        if (codeStatus.size()==0){
            System.out.println("The list does not contain any element");
        } else if (codeStatus.size()==1) {
            if(codeStatus.contains('C') || codeStatus.contains('N')) {
                System.out.println("Either 'C' or 'N' exists");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }            
        } else if(codeStatus.size()==2) {
            if (codeStatus.contains('C') && codeStatus.contains('N')) {
                System.out.println("Only 'C' and 'N' exists");
            } else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            }
        }else if (codeStatus.size()>2) {
            if((codeStatus.contains('C') && codeStatus.contains('N'))) {
                System.out.println("Other than 'C' and 'N', some other character(s) exist(s)");
            }else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }           
        }
    }
}

---

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import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Character> codeStatus = Arrays.asList(new Character[] { 'C','N','T'});
        if (codeStatus.size()==0){
            System.out.println("The list does not contain any element");
        } else if (codeStatus.size()==1) {
            if(codeStatus.contains('C') || codeStatus.contains('N')) {
                System.out.println("Either 'C' or 'N' exists");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }            
        } else if(codeStatus.size()==2) {
            if (codeStatus.contains('C') && codeStatus.contains('N')) {
                System.out.println("Only 'C' and 'N' exists");
            } else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            }
        }else if (codeStatus.size()>2) {
            if((codeStatus.contains('C') && codeStatus.contains('N'))) {
                System.out.println("Other than 'C' and 'N', some other character(s) exist(s)");
            }else if((codeStatus.contains('C') || codeStatus.contains('N'))){
                System.out.println("Other than 'C' or 'N', some other character(s) exist(s)");
            } else {
                System.out.println("Neither 'N' nor 'C' exists");
            }           
        }
    }
}

Other than 'C' and 'N', some other character(s) exist(s)