fix: don't add 'default' for static methods in interfaces

jadx-core/src/main/java/jadx/core/codegen/MethodGen.java

@@ -110,7 +110,7 @@ public class MethodGen {
 		if (Consts.DEBUG) {
 			code.add(mth.isVirtual() ? "/* virtual */ " : "/* direct */ ");
 		}
-		if (clsAccFlags.isInterface() && !mth.isNoCode()) {
+		if (clsAccFlags.isInterface() && !mth.isNoCode() && !mth.getAccessFlags().isStatic()) {
 			// add 'default' for method with code in interface
 			code.add("default ");
 		}

jadx-core/src/test/java/jadx/tests/integration/others/TestInterfaceDefaultMethod.java

@@ -0,0 +1,37 @@
+package jadx.tests.integration.others;
+
+import org.junit.jupiter.api.Test;
+
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.assertj.JadxAssertions.assertThat;
+
+public class TestInterfaceDefaultMethod extends IntegrationTest {
+
+	public static class TestCls {
+
+		@SuppressWarnings("UnnecessaryInterfaceModifier")
+		public interface ITest {
+			void test1();
+
+			default void test2() {
+			}
+
+			static void test3() {
+			}
+
+			abstract void test4();
+		}
+	}
+
+	@Test
+	public void test() {
+		assertThat(getClassNode(TestCls.class))
+				.code()
+				.doesNotContain("static default")
+				.doesNotContain("abstract")
+				.containsOne("void test1();")
+				.containsOne("default void test2() {")
+				.containsOne("static void test3() {");
+	}
+}