Polish JSON classes

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/json-shade/java/org/springframework/boot/configurationprocessor/json/JSONStringer.java

@@ -321,40 +321,20 @@ public class JSONStringer {
 			 * reverse solidus, and the control characters (U+0000 through U+001F)."
 			 */
 			switch (c) {
-				case '"':
-				case '\\':
-				case '/':
-					this.out.append('\\').append(c);
-					break;
-
-				case '\t':
-					this.out.append("\\t");
-					break;
-
-				case '\b':
-					this.out.append("\\b");
-					break;
-
-				case '\n':
-					this.out.append("\\n");
-					break;
-
-				case '\r':
-					this.out.append("\\r");
-					break;
-
-				case '\f':
-					this.out.append("\\f");
-					break;
-
-				default:
+				case '"', '\\', '/' -> this.out.append('\\').append(c);
+				case '\t' -> this.out.append("\\t");
+				case '\b' -> this.out.append("\\b");
+				case '\n' -> this.out.append("\\n");
+				case '\r' -> this.out.append("\\r");
+				case '\f' -> this.out.append("\\f");
+				default -> {
 					if (c <= 0x1F) {
 						this.out.append(String.format("\\u%04x", (int) c));
 					}
 					else {
 						this.out.append(c);
 					}
-					break;
+				}
 			}
 
 		}
@@ -367,9 +347,7 @@ public class JSONStringer {
 		}
 
 		this.out.append("\n");
-		for (int i = 0; i < this.stack.size(); i++) {
-			this.out.append(this.indent);
-		}
+		this.out.append(this.indent.repeat(this.stack.size()));
 	}
 
 	/**

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/json-shade/java/org/springframework/boot/configurationprocessor/json/JSONTokener.java

@@ -100,8 +100,7 @@ public class JSONTokener {
 			case '[':
 				return readArray();
 
-			case '\'':
-			case '"':
+			case '\'', '"':
 				return nextString((char) c);
 
 			default:
@@ -114,10 +113,7 @@ public class JSONTokener {
 		while (this.pos < this.in.length()) {
 			int c = this.in.charAt(this.pos++);
 			switch (c) {
-				case '\t':
-				case ' ':
-				case '\n':
-				case '\r':
+				case '\t', ' ', '\n', '\r':
 					continue;
 
 				case '/':
@@ -262,9 +258,7 @@ public class JSONTokener {
 			case 'f':
 				return '\f';
 
-			case '\'':
-			case '"':
-			case '\\':
+			case '\'', '"', '\\':
 			default:
 				return escaped;
 		}
@@ -398,8 +392,7 @@ public class JSONTokener {
 			switch (nextCleanInternal()) {
 				case '}':
 					return result;
-				case ';':
-				case ',':
+				case ';', ',':
 					continue;
 				default:
 					throw syntaxError("Unterminated object");
@@ -429,8 +422,7 @@ public class JSONTokener {
 						result.put(null);
 					}
 					return result;
-				case ',':
-				case ';':
+				case ',', ';':
 					/* A separator without a value first means "null". */
 					result.put(null);
 					hasTrailingSeparator = true;
@@ -444,8 +436,7 @@ public class JSONTokener {
 			switch (nextCleanInternal()) {
 				case ']':
 					return result;
-				case ',':
-				case ';':
+				case ',', ';':
 					hasTrailingSeparator = true;
 					continue;
 				default: