[java-inspections] IDEA-378586 Impossible to compute constant for '\''

GitOrigin-RevId: ba58288dab3e558c1a1fe4529e8abe4ef26482fa

java/java-analysis-impl/src/com/siyeh/ig/style/ConstantExpressionInspection.java

@@ -162,7 +162,7 @@ public final class ConstantExpressionInspection extends AbstractBaseJavaLocalIns
       newExpression = '"' + StringUtil.escapeStringCharacters(string) + '"';
     }
     else if (value instanceof Character) {
-      newExpression = '\'' + StringUtil.escapeStringCharacters(value.toString()) + '\'';
+      newExpression = '\'' + StringUtil.escapeCharCharacters(value.toString()) + '\'';
     }
     else if (value instanceof Long) {
       newExpression = value.toString() + 'L';

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/constantExpression/afterCharQuote.java

@@ -0,0 +1,12 @@
+// "Compute constant value of 'SINGLE_QUOTE'" "true-preview"
+
+class ConstantCast {
+  public static final char SINGLE_QUOTE = '\'';
+
+  static void doSomething(Object o) {
+  }
+
+  public static void main(String[] args) {
+    doSomething('\'');
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/constantExpression/beforeCharQuote.java

@@ -0,0 +1,12 @@
+// "Compute constant value of 'SINGLE_QUOTE'" "true-preview"
+
+class ConstantCast {
+  public static final char SINGLE_QUOTE = '\'';
+
+  static void doSomething(Object o) {
+  }
+
+  public static void main(String[] args) {
+    doSomething(SINGLE_QUOTE<caret>);
+  }
+}