[java-intentions] Quick-fixes to change method/var return type when inference fails

Fixes IDEA-354184 Quick-fix for generic types

GitOrigin-RevId: 65d513f5303a082c26283e09275470840df90d30

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturn8/afterGeneric.java

@@ -0,0 +1,12 @@
+// "Make 'getList()' return 'A.Box<java.util.List<java.lang.String>>' or ancestor" "true-preview"
+import java.util.*;
+
+public class A {
+  Box<List<String>> getList() {
+    return new Box<>(Arrays.asList("foo"));
+  }
+
+  class Box<T> {
+    Box(T value) {}
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/methodReturn8/beforeGeneric.java

@@ -0,0 +1,12 @@
+// "Make 'getList()' return 'A.Box<java.util.List<java.lang.String>>' or ancestor" "true-preview"
+import java.util.*;
+
+public class A {
+  Box<Set<String>> getList() {
+    return new <caret>Box<>(Arrays.asList("foo"));
+  }
+
+  class Box<T> {
+    Box(T value) {}
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/variableType/afterGeneric.java

@@ -0,0 +1,12 @@
+// "Change variable 'box' type to 'A.Box<List<String>>'" "true-preview"
+import java.util.*;
+
+public class A {
+  void test() {
+    Box<List<String>> box = new Box<>(Arrays.asList("foo"));
+  }
+
+  class Box<T> {
+    Box(T value) {}
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/variableType/beforeGeneric.java

@@ -0,0 +1,12 @@
+// "Change variable 'box' type to 'A.Box<List<String>>'" "true-preview"
+import java.util.*;
+
+public class A {
+  void test() {
+    Box<Set<String>> box = new <caret>Box<>(Arrays.asList("foo"));
+  }
+
+  class Box<T> {
+    Box(T value) {}
+  }
+}