Showing 14,752 of 14,752 total issues
Define a constant instead of duplicating this literal "typePU" 4 times. Open
DBKernel.delimitL("Unitmenge") + "," + DBKernel.delimitL("UnitEinheit") + "," + DBKernel.delimitL("numPU") + "," + DBKernel.delimitL("typePU") + "," +
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Define a constant instead of duplicating this literal "file.separator" 3 times. Open
DBKernel.myDBi = MyDBI.loadDB(textField2.getText() + System.getProperty("file.separator") + DBKernel.dbKennung + ".xml");
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Define a constant instead of duplicating this literal "LAST_USER_LOGIN" 3 times. Open
String lastUser = DBKernel.prefs.get("LAST_USER_LOGIN", "");
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Refactor this method to reduce its Cognitive Complexity from 69 to the 15 allowed. Open
private MainFrame loadDB(Boolean autoUpdate, boolean openTheGui, boolean beInteractive) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Don't try to be smarter than the JVM, remove this call to run the garbage collector. Open
System.gc();
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Calling System.gc()
or Runtime.getRuntime().gc()
is a bad idea for a simple reason: there is no way to know exactly what
will be done under the hood by the JVM because the behavior will depend on its vendor, version and options:
- Will the whole application be frozen during the call?
- Is the
-XX:DisableExplicitGC
option activated? - Will the JVM simply ignore the call?
- ...
Like for System.gc()
, there is no reason to manually call runFinalization()
to force the call of finalization methods of
any objects pending finalization.
An application relying on these unpredictable methods is also unpredictable and therefore broken. The task of running the garbage collector and
calling finalize()
methods should be left exclusively to the JVM.
Refactor this method to reduce its Cognitive Complexity from 22 to the 15 allowed. Open
public boolean isFilledBlobField(final int row, final int col) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 33 to the 15 allowed. Open
public Object cellValueChanged(int row, int col, Object oldValue, Object newValue) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 29 to the 15 allowed. Open
void button11ActionPerformed(ActionEvent e) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Make "refresher" transient or serializable. Open
private Callable<Void> refresher;
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Fields in a Serializable
class must themselves be either Serializable
or transient
even if the class is
never explicitly serialized or deserialized. For instance, under load, most J2EE application frameworks flush objects to disk, and an allegedly
Serializable
object with non-transient, non-serializable data members could cause program crashes, and open the door to attackers. In
general a Serializable
class is expected to fulfil its contract and not have an unexpected behaviour when an instance is serialized.
This rule raises an issue on non-Serializable
fields, and on collection fields when they are not private
(because they
could be assigned non-Serializable
values externally), and when they are assigned non-Serializable
types within the
class.
Noncompliant Code Example
public class Address { //... } public class Person implements Serializable { private static final long serialVersionUID = 1905122041950251207L; private String name; private Address address; // Noncompliant; Address isn't serializable }
Compliant Solution
public class Address implements Serializable { private static final long serialVersionUID = 2405172041950251807L; } public class Person implements Serializable { private static final long serialVersionUID = 1905122041950251207L; private String name; private Address address; }
Exceptions
The alternative to making all members serializable
or transient
is to implement special methods which take on the
responsibility of properly serializing and de-serializing the object. This rule ignores classes which implement the following methods:
private void writeObject(java.io.ObjectOutputStream out) throws IOException private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException;
See
- MITRE, CWE-594 - Saving Unserializable Objects to Disk
- Oracle Java 6, Serializable
- Oracle Java 7, Serializable
Refactor this method to reduce its Cognitive Complexity from 20 to the 15 allowed. Open
public static boolean passesFilter(
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 33 to the 15 allowed. Open
protected BufferedDataTable[] execute(BufferedDataTable[] inData, ExecutionContext exec) throws Exception {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 17 to the 15 allowed. Open
protected BufferedDataTable[] execute(final BufferedDataTable[] inData, final ExecutionContext exec)
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Define a constant instead of duplicating this literal "SonstigeParameter" 3 times. Open
String name = DBKernel.getValue("SonstigeParameter", "ID", id + "", "Parameter") + "";
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Define a constant instead of duplicating this literal " WHERE " 6 times. Open
" WHERE " + DBKernel.delimitL("Lieferungen") + "." + DBKernel.delimitL("Empfänger") + "=" + stationId;
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Define a constant instead of duplicating this literal "Prozess_ID" 3 times. Open
ResultSet rs = DBKernel.getResultSet("SELECT " + DBKernel.delimitL("ID") + "," + DBKernel.delimitL("Prozess_ID") + "," + DBKernel.delimitL("ProzessElement") +
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.
Refactor this method to reduce its Cognitive Complexity from 27 to the 15 allowed. Open
public void actionPerformed(ActionEvent e) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 17 to the 15 allowed. Open
void insertNull(final int selRow, final int selCol) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 71 to the 15 allowed. Open
private void copyDetails(final MyTable myT, final Integer oldID, final Integer id) {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Refactor this method to reduce its Cognitive Complexity from 214 to the 15 allowed. Open
private void prepareColumns() {
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Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.
See
Define a constant instead of duplicating this literal "Wiederholungen" 3 times. Open
label3.setText("Wiederholungen");
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Duplicated string literals make the process of refactoring error-prone, since you must be sure to update all occurrences.
On the other hand, constants can be referenced from many places, but only need to be updated in a single place.
Noncompliant Code Example
With the default threshold of 3:
public void run() { prepare("action1"); // Noncompliant - "action1" is duplicated 3 times execute("action1"); release("action1"); } @SuppressWarning("all") // Compliant - annotations are excluded private void method1() { /* ... */ } @SuppressWarning("all") private void method2() { /* ... */ } public String method3(String a) { System.out.println("'" + a + "'"); // Compliant - literal "'" has less than 5 characters and is excluded return ""; // Compliant - literal "" has less than 5 characters and is excluded }
Compliant Solution
private static final String ACTION_1 = "action1"; // Compliant public void run() { prepare(ACTION_1); // Compliant execute(ACTION_1); release(ACTION_1); }
Exceptions
To prevent generating some false-positives, literals having less than 5 characters are excluded.