Fix deleting of semicolon when it required to mark statement empty

#KT-18142 fixed
#KT-18141 fixed

j2k/src/org/jetbrains/kotlin/j2k/ast/Statements.kt

@@ -69,6 +69,9 @@ class IfStatement(
         if (!elseStatement.isEmpty) {
             builder append br append "else" append brAfterElse append elseStatement.wrapToBlockIfRequired()
         }
+        else if (thenStatement.isEmpty) {
+            builder append ";"
+        }
     }
 }
 
@@ -79,6 +82,9 @@ class WhileStatement(val condition: Expression, val body: Element, singleLine: B
 
     override fun generateCode(builder: CodeBuilder) {
         builder append "while (" append condition append ")" append br append body.wrapToBlockIfRequired()
+        if (body.isEmpty) {
+            builder append ";"
+        }
     }
 }
 
@@ -106,6 +112,9 @@ class ForeachStatement(
             builder append ":" append explicitVariableType
         }
         builder append " in " append collection append ")" append br append body.wrapToBlockIfRequired()
+        if (body.isEmpty) {
+            builder append ";"
+        }
     }
 }
 

j2k/testData/fileOrElement/for/forWithoutBody.java

@@ -0,0 +1,6 @@
+public class A {
+    public void aVoid() {
+        for (int i = 0; i < 10; i++);
+        System.out.println("Done");
+    }
+}

j2k/testData/fileOrElement/for/forWithoutBody.kt

@@ -0,0 +1,6 @@
+class A {
+    fun aVoid() {
+        for (i in 0..9);
+        println("Done")
+    }
+}

j2k/testData/fileOrElement/foreachStatement/foreachWithoutBody.java

@@ -0,0 +1,8 @@
+public class A {
+    public void aVoid() {
+        int[] array = new int[10];
+
+        for (int i : array);
+        System.out.println("Done");
+    }
+}

j2k/testData/fileOrElement/foreachStatement/foreachWithoutBody.kt

@@ -0,0 +1,8 @@
+class A {
+    fun aVoid() {
+        val array = IntArray(10)
+
+        for (i in array);
+        println("Done")
+    }
+}

j2k/testData/fileOrElement/ifStatement/ifWithoutThen.java

@@ -0,0 +1,8 @@
+public class A {
+    public void aVoid() {
+        int i = 0;
+
+        if (i > 10);
+        System.out.println("Done");
+    }
+}

j2k/testData/fileOrElement/ifStatement/ifWithoutThen.kt

@@ -0,0 +1,8 @@
+class A {
+    fun aVoid() {
+        val i = 0
+
+        if (i > 10);
+        println("Done")
+    }
+}

j2k/testData/fileOrElement/whileStatement/whileWithoutBody.java

@@ -0,0 +1,8 @@
+public class A {
+    public void aVoid() {
+        int i = 0;
+
+        while(i++ < 10);
+        System.out.println("Done");
+    }
+}

j2k/testData/fileOrElement/whileStatement/whileWithoutBody.kt

@@ -0,0 +1,8 @@
+class A {
+    fun aVoid() {
+        var i = 0
+
+        while (i++ < 10);
+        println("Done")
+    }
+}

j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterForWebDemoTestGenerated.java

@@ -2288,6 +2288,12 @@ public class JavaToKotlinConverterForWebDemoTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("forWithoutBody.java")
+        public void testForWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/for/forWithoutBody.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("indicesReversed.java")
         public void testIndicesReversed() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/for/indicesReversed.java");
@@ -2399,6 +2405,12 @@ public class JavaToKotlinConverterForWebDemoTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("foreachWithoutBody.java")
+        public void testForeachWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/foreachStatement/foreachWithoutBody.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("nullableIterable.java")
         public void testNullableIterable() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/foreachStatement/nullableIterable.java");
@@ -2723,6 +2735,12 @@ public class JavaToKotlinConverterForWebDemoTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("ifWithoutThen.java")
+        public void testIfWithoutThen() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/ifStatement/ifWithoutThen.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("multiLine.java")
         public void testMultiLine() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/ifStatement/multiLine.java");
@@ -5095,5 +5113,11 @@ public class JavaToKotlinConverterForWebDemoTestGenerated extends AbstractJavaTo
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/whileStatement/whileWithReturn.java");
             doTest(fileName);
         }
+
+        @TestMetadata("whileWithoutBody.java")
+        public void testWhileWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/whileStatement/whileWithoutBody.java");
+            doTest(fileName);
+        }
     }
 }

j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterSingleFileTestGenerated.java

@@ -2288,6 +2288,12 @@ public class JavaToKotlinConverterSingleFileTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("forWithoutBody.java")
+        public void testForWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/for/forWithoutBody.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("indicesReversed.java")
         public void testIndicesReversed() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/for/indicesReversed.java");
@@ -2399,6 +2405,12 @@ public class JavaToKotlinConverterSingleFileTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("foreachWithoutBody.java")
+        public void testForeachWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/foreachStatement/foreachWithoutBody.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("nullableIterable.java")
         public void testNullableIterable() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/foreachStatement/nullableIterable.java");
@@ -2723,6 +2735,12 @@ public class JavaToKotlinConverterSingleFileTestGenerated extends AbstractJavaTo
             doTest(fileName);
         }
 
+        @TestMetadata("ifWithoutThen.java")
+        public void testIfWithoutThen() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/ifStatement/ifWithoutThen.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("multiLine.java")
         public void testMultiLine() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/ifStatement/multiLine.java");
@@ -5095,5 +5113,11 @@ public class JavaToKotlinConverterSingleFileTestGenerated extends AbstractJavaTo
             String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/whileStatement/whileWithReturn.java");
             doTest(fileName);
         }
+
+        @TestMetadata("whileWithoutBody.java")
+        public void testWhileWithoutBody() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/fileOrElement/whileStatement/whileWithoutBody.java");
+            doTest(fileName);
+        }
     }
 }