Use String.repeat instead of explicit cycle

See gh-31802

spring-beans/src/main/java/org/springframework/beans/factory/parsing/ParseState.java

@@ -98,9 +98,7 @@ public final class ParseState {
 		for (ParseState.Entry entry : this.state) {
 			if (i > 0) {
 				sb.append('\n');
-				for (int j = 0; j < i; j++) {
-					sb.append('\t');
-				}
+                sb.append("\t".repeat(i));
 				sb.append("-> ");
 			}
 			sb.append(entry);

spring-core/src/main/java/org/springframework/asm/Type.java

@@ -462,9 +462,7 @@ public final class Type {
         return "double";
       case ARRAY:
         StringBuilder stringBuilder = new StringBuilder(getElementType().getClassName());
-        for (int i = getDimensions(); i > 0; --i) {
-          stringBuilder.append("[]");
-        }
+          stringBuilder.append("[]".repeat(Math.max(0, getDimensions())));
         return stringBuilder.toString();
       case OBJECT:
       case INTERNAL:

spring-core/src/main/java/org/springframework/cglib/core/ReflectUtils.java

@@ -218,9 +218,7 @@ public class ReflectUtils {
 			dimensions++;
 		}
 		StringBuilder brackets = new StringBuilder(className.length() - dimensions);
-		for (int i = 0; i < dimensions; i++) {
-			brackets.append('[');
-		}
+        brackets.append("[".repeat(Math.max(0, dimensions)));
 		className = className.substring(0, className.length() - 2 * dimensions);
 
 		String prefix = (dimensions > 0) ? brackets + "L" : "";

spring-web/src/main/java/org/springframework/web/util/pattern/PatternParseException.java

@@ -68,9 +68,7 @@ public class PatternParseException extends IllegalArgumentException {
 	public String toDetailedString() {
 		StringBuilder sb = new StringBuilder();
 		sb.append(this.pattern).append('\n');
-		for (int i = 0; i < this.position; i++) {
-			sb.append(' ');
-		}
+        sb.append(" ".repeat(Math.max(0, this.position)));
 		sb.append("^\n");
 		sb.append(getMessage());
 		return sb.toString();

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/ToStringVisitor.java

@@ -81,9 +81,7 @@ class ToStringVisitor implements RouterFunctions.Visitor, RequestPredicates.Visi
 	}
 
 	private void indent() {
-		for (int i = 0; i < this.indent; i++) {
-			this.builder.append(' ');
-		}
+        this.builder.append(" ".repeat(Math.max(0, this.indent)));
 	}
 
 

spring-webmvc/src/main/java/org/springframework/web/servlet/function/ToStringVisitor.java

@@ -80,9 +80,7 @@ class ToStringVisitor implements RouterFunctions.Visitor, RequestPredicates.Visi
 	}
 
 	private void indent() {
-		for (int i = 0; i < this.indent; i++) {
-			this.builder.append(' ');
-		}
+        this.builder.append(" ".repeat(Math.max(0, this.indent)));
 	}
 
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/frame/AbstractSockJsMessageCodec.java

@@ -59,9 +59,7 @@ public abstract class AbstractSockJsMessageCodec implements SockJsMessageCodec {
 			if (isSockJsSpecialChar(c)) {
 				result.append('\\').append('u');
 				String hex = Integer.toHexString(c).toLowerCase();
-				for (int i = 0; i < (4 - hex.length()); i++) {
-					result.append('0');
-				}
+                result.append("0".repeat(Math.max(0, (4 - hex.length()))));
 				result.append(hex);
 			}
 			else {