fix linter

Author: APshenkin

framework/src/main/java/org/tron/core/Wallet.java

@@ -199,14 +199,14 @@
 import org.tron.core.store.MarketPairPriceToOrderStore;
 import org.tron.core.store.MarketPairToPriceStore;
 import org.tron.core.store.StoreFactory;
-import org.tron.core.vm.program.listener.BufferingSimulationTracer;
-import org.tron.core.vm.program.listener.SimulationTracer;
-import org.tron.core.vm.repository.Repository;
-import org.tron.core.vm.repository.RepositoryImpl;
 import org.tron.core.store.VotesStore;
 import org.tron.core.store.WitnessStore;
 import org.tron.core.utils.TransactionUtil;
 import org.tron.core.vm.program.Program;
+import org.tron.core.vm.program.listener.BufferingSimulationTracer;
+import org.tron.core.vm.program.listener.SimulationTracer;
+import org.tron.core.vm.repository.Repository;
+import org.tron.core.vm.repository.RepositoryImpl;
 import org.tron.core.zen.ShieldedTRC20ParametersBuilder;
 import org.tron.core.zen.ShieldedTRC20ParametersBuilder.ShieldedTRC20ParametersType;
 import org.tron.core.zen.ZenTransactionBuilder;
@@ -3273,7 +3273,8 @@ public SimulateOutcome simulateConstantContracts(List<TransactionCapsule> trxCap
     return new SimulateOutcome(headBlockCapsule, outcomes);
   }
 
-  private static String validateSenderForSimulate(TransactionCapsule trxCap, Repository perCallChild) {
+  private static String validateSenderForSimulate(TransactionCapsule trxCap,
+      Repository perCallChild) {
     if (trxCap.getInstance().getRawData().getContractCount() == 0) {
       return null;
     }

framework/src/main/java/org/tron/core/services/jsonrpc/TronJsonRpcImpl.java

@@ -24,6 +24,7 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -94,9 +95,9 @@
 import org.tron.core.services.jsonrpc.types.TransactionReceipt;
 import org.tron.core.services.jsonrpc.types.TransactionReceipt.TransactionContext;
 import org.tron.core.services.jsonrpc.types.TransactionResult;
-import org.tron.core.vm.program.listener.BufferingSimulationTracer;
 import org.tron.core.store.StorageRowStore;
 import org.tron.core.vm.program.Storage;
+import org.tron.core.vm.program.listener.BufferingSimulationTracer;
 import org.tron.json.JSON;
 import org.tron.program.Version;
 import org.tron.protos.Protocol.Account;
@@ -1136,7 +1137,7 @@ public List<SimulateBlockResult> ethSimulateV1(SimulateV1Args args, Object block
       throw new JsonRpcInternalException(msg);
     }
 
-    return List.of(buildSimulateBlockResult(outcome, block.getCalls(),
+    return Collections.singletonList(buildSimulateBlockResult(outcome, block.getCalls(),
         args.isTraceTransfers(), args.isReturnFullTransactions()));
   }