diff --git a/broker/src/main/java/org/apache/rocketmq/broker/BrokerStartup.java b/broker/src/main/java/org/apache/rocketmq/broker/BrokerStartup.java
index e768c7f95eb4cd803c869a755bf44665d3c0a429..40d20863747bf83105c5b5e251c577a62647a7d3 100644
--- a/broker/src/main/java/org/apache/rocketmq/broker/BrokerStartup.java
+++ b/broker/src/main/java/org/apache/rocketmq/broker/BrokerStartup.java
@@ -134,8 +134,7 @@ public class BrokerStartup {
             MixAll.properties2Object(ServerUtil.commandLine2Properties(commandLine), brokerConfig);
 
             if (null == brokerConfig.getRocketmqHome()) {
-                System.out.printf("Please set the " + MixAll.ROCKETMQ_HOME_ENV
-                    + " variable in your environment to match the location of the RocketMQ installation");
+                System.out.printf("Please set the %s variable in your environment to match the location of the RocketMQ installation", MixAll.ROCKETMQ_HOME_ENV);
                 System.exit(-2);
             }
 
diff --git a/namesrv/src/main/java/org/apache/rocketmq/namesrv/NamesrvStartup.java b/namesrv/src/main/java/org/apache/rocketmq/namesrv/NamesrvStartup.java
index 0a0c6562d6f70226d643ba24174536ec2b9765b5..d7a2b2b644d00cc56925be1c3b9cff15ce5c2dd5 100644
--- a/namesrv/src/main/java/org/apache/rocketmq/namesrv/NamesrvStartup.java
+++ b/namesrv/src/main/java/org/apache/rocketmq/namesrv/NamesrvStartup.java
@@ -72,7 +72,7 @@ public class NamesrvStartup {
 
                     namesrvConfig.setConfigStorePath(file);
 
-                    System.out.printf("load config properties file OK, " + file + "%n");
+                    System.out.printf("load config properties file OK, %s%n", file);
                     in.close();
                 }
             }
@@ -123,7 +123,7 @@ public class NamesrvStartup {
 
             String tip = "The Name Server boot success. serializeType=" + RemotingCommand.getSerializeTypeConfigInThisServer();
             log.info(tip);
-            System.out.printf(tip + "%n");
+            System.out.printf("%s%n", tip);
 
             return controller;
         } catch (Throwable e) {
diff --git a/tools/src/main/java/org/apache/rocketmq/tools/command/cluster/CLusterSendMsgRTCommand.java b/tools/src/main/java/org/apache/rocketmq/tools/command/cluster/CLusterSendMsgRTCommand.java
index 37d66e4c76c0d113b49b9485e6ffb6b39e576241..ecbe1f38a54def3368ec02e2f1893f516e29f73d 100644
--- a/tools/src/main/java/org/apache/rocketmq/tools/command/cluster/CLusterSendMsgRTCommand.java
+++ b/tools/src/main/java/org/apache/rocketmq/tools/command/cluster/CLusterSendMsgRTCommand.java
@@ -171,7 +171,7 @@ public class CLusterSendMsgRTCommand implements SubCommand {
                                 failCount
                             );
                         } else {
-                            System.out.printf(String.format("%s|%s|%s|%s|%s%n", getCurTime(),
+                            System.out.printf("%s", String.format("%s|%s|%s|%s|%s%n", getCurTime(),
                                 machineRoom, clusterName, brokerName,
                                 new BigDecimal(rt).setScale(0, BigDecimal.ROUND_HALF_UP)));
                         }
diff --git a/tools/src/main/java/org/apache/rocketmq/tools/command/consumer/ConsumerSubCommand.java b/tools/src/main/java/org/apache/rocketmq/tools/command/consumer/ConsumerSubCommand.java
index a6df8ea8ecf45a93c52c8067f74dddd10fe956b6..f3b1fccf32da190f86549bf31ff80263e3647aa1 100644
--- a/tools/src/main/java/org/apache/rocketmq/tools/command/consumer/ConsumerSubCommand.java
+++ b/tools/src/main/java/org/apache/rocketmq/tools/command/consumer/ConsumerSubCommand.java
@@ -126,7 +126,7 @@ public class ConsumerSubCommand implements SubCommand {
                 ConsumerRunningInfo consumerRunningInfo =
                     defaultMQAdminExt.getConsumerRunningInfo(group, clientId, jstack);
                 if (consumerRunningInfo != null) {
-                    System.out.printf(consumerRunningInfo.formatString());
+                    System.out.printf("%s", consumerRunningInfo.formatString());
                 }
             }
         } catch (Exception e) {
diff --git a/tools/src/main/java/org/apache/rocketmq/tools/command/message/PrintMessageSubCommand.java b/tools/src/main/java/org/apache/rocketmq/tools/command/message/PrintMessageSubCommand.java
index c8fced3b16e3d4baf99e579c12944d85b9597162..b204f0abfb09ec624afd2ed5646be72605b264b7 100644
--- a/tools/src/main/java/org/apache/rocketmq/tools/command/message/PrintMessageSubCommand.java
+++ b/tools/src/main/java/org/apache/rocketmq/tools/command/message/PrintMessageSubCommand.java
@@ -146,11 +146,11 @@ public class PrintMessageSubCommand implements SubCommand {
                                 printMessage(pullResult.getMsgFoundList(), charsetName, printBody);
                                 break;
                             case NO_MATCHED_MSG:
-                                System.out.printf(mq + " no matched msg. status=%s, offset=%s", pullResult.getPullStatus(), offset);
+                                System.out.printf("%s no matched msg. status=%s, offset=%s", mq, pullResult.getPullStatus(), offset);
                                 break;
                             case NO_NEW_MSG:
                             case OFFSET_ILLEGAL:
-                                System.out.printf(mq + " print msg finished. status=%s, offset=%s", pullResult.getPullStatus(), offset);
+                                System.out.printf("%s print msg finished. status=%s, offset=%s", mq, pullResult.getPullStatus(), offset);
                                 break READQ;
                         }
                     } catch (Exception e) {
diff --git a/tools/src/main/java/org/apache/rocketmq/tools/command/topic/UpdateTopicSubCommand.java b/tools/src/main/java/org/apache/rocketmq/tools/command/topic/UpdateTopicSubCommand.java
index 8fdb9d3dbf8f64a63996a2c7537a694a6a4eeb62..c9c8a88fd929e43fbd4462d8c2dc1362cb539957 100644
--- a/tools/src/main/java/org/apache/rocketmq/tools/command/topic/UpdateTopicSubCommand.java
+++ b/tools/src/main/java/org/apache/rocketmq/tools/command/topic/UpdateTopicSubCommand.java
@@ -138,7 +138,7 @@ public class UpdateTopicSubCommand implements SubCommand {
                     String brokerName = CommandUtil.fetchBrokerNameByAddr(defaultMQAdminExt, addr);
                     String orderConf = brokerName + ":" + topicConfig.getWriteQueueNums();
                     defaultMQAdminExt.createOrUpdateOrderConf(topicConfig.getTopicName(), orderConf, false);
-                    System.out.printf(String.format("set broker orderConf. isOrder=%s, orderConf=[%s]",
+                    System.out.printf("%s", String.format("set broker orderConf. isOrder=%s, orderConf=[%s]",
                         isOrder, orderConf.toString()));
                 }
                 System.out.printf("create topic to %s success.%n", addr);