if (staticMethod2(param1)) {...}

Week 6: Methods of OO Programming/02. Class SecretAgent

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+Write a class SecretAgent, which has the following features:
+A constructor that takes as parameters a name (string) and a code (string)
+Get methods getName and getCode.
+Set method setCode(String code), which sets the code attribute if the given parameter follows the rules (rules below); otherwise, the code is set to "000"
+A static method static boolean codeOk(String code), which returns true if the code is according to the rules
+The code 'follows the rules' if it has exactly 3 numbers and no other characters. 
+The first 2 numbers must be zeros.
+
+
+
+
+
+
+import java.util.Random;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+
+        System.out.println("Testing the class SecretAgent...");
+
+        String[] en = "James Jane John Jill Jim Janet George Sarah Oliver Emma".split(" ");
+        String[] sn = "Bond Pond Smith Johnson Clarke Wilson Taylor Morris".split(" ");
+        String[] k = "500 505 040 00A 00X XYZ X0X 700 777 0X0X 0007 0003 0070".split(" ");
+        
+        for (int test = 1; test <=2; test++) {
+            System.out.println("Test " + test);
+            
+            String name = en[r.nextInt(en.length)] + " " + sn[r.nextInt(sn.length)];
+            String code = "00" + (r.nextInt(9) + 1);
+            SecretAgent sa = new SecretAgent(name, code);
+            
+            System.out.println("Object created with parameters (" + name + ", " + code + ")");
+            
+            System.out.println("getName() returns " + sa.getName());
+            System.out.println("getCode() returns " + sa.getCode());
+            
+            System.out.println("Attempting to change code to a valid one...");
+            
+            for (int iteration=1; iteration<= 2; iteration++) {
+                code = "00" + (r.nextInt(9) + 1);
+                System.out.println("Attempting with code " + code);
+                sa.setCode(code);
+                System.out.println("getCode() returns " + sa.getCode());
+            }
+            
+            System.out.println("Attempting to change code to an invalid one...");
+ 
+            code = k[r.nextInt(k.length)];
+            System.out.println("Attempting with code " + code);
+            sa.setCode(code);
+            System.out.println("getCode() returns " + sa.getCode());
+        }
+        
+        System.out.println("Test 3: Calling the static method");
+        String[] codes = "007 004 003 008 0009 070 00A 600 888".split(" ");
+        for (String code : codes) {
+            System.out.println("Testing code " + code + ", valid: " + SecretAgent.codeOk(code));
+        }
+        
+    }
+}
+
+
+
+
+//ADD
+class SecretAgent {
+    private String name;
+    private String code;
+
+    public SecretAgent(String name, String code) {
+        this.name = name;
+        this.code = code;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        if (codeOk(code)) {
+            this.code = code;
+        } else {
+            this.code = "000";
+        }
+    }
+
+    // https://www.geeksforgeeks.org/java-string-matches-method-in-java-with-examples/
+    // https://stackoverflow.com/questions/28145881/how-does-d-work-in-java
+    public static boolean codeOk(String code) {
+        return code.matches("00\\d");
+    }
+}
+
+
+
+
+Testing the class SecretAgent...
+Test 1
+Object created with parameters (George Taylor, 005)
+getName() returns George Taylor
+getCode() returns 005
+Attempting to change code to a valid one...
+Attempting with code 003
+getCode() returns 003
+Attempting with code 003
+getCode() returns 003
+Attempting to change code to an invalid one...
+Attempting with code 500
+getCode() returns 000
+Test 2
+Object created with parameters (Emma Taylor, 002)
+getName() returns Emma Taylor
+getCode() returns 002
+Attempting to change code to a valid one...
+Attempting with code 002
+getCode() returns 002
+Attempting with code 006
+getCode() returns 006
+Attempting to change code to an invalid one...
+Attempting with code 700
+getCode() returns 000
+Test 3: Calling the static method
+Testing code 007, valid: true
+Testing code 004, valid: true
+Testing code 003, valid: true
+Testing code 008, valid: true
+Testing code 0009, valid: false
+Testing code 070, valid: false
+Testing code 00A, valid: false
+Testing code 600, valid: false
+Testing code 888, valid: false
+