{

"id": 31,

"slug": "string-repeat",

"title": "String.repeat()",

"category": "strings",

"difficulty": "beginner",

"jdkVersion": "11",

"oldLabel": "Java 8",

"modernLabel": "Java 11+",

"oldApproach": "StringBuilder Loop",

"modernApproach": "repeat()",

"oldCode": "StringBuilder sb = new StringBuilder();\nfor (int i = 0; i < 3; i++) {\n sb.append(\"abc\");\n}\nString result = sb.toString();",

"modernCode": "String result = \"abc\".repeat(3);\n// \"abcabcabc\"",

"summary": "Repeat a string n times without a loop.",

"explanation": "String.repeat(int) returns the string concatenated with itself n times. Handles edge cases: repeat(0) returns empty string, repeat(1) returns the same string.",

"whyModernWins": [

{

"icon": "📏",

"title": "One-liner",

"desc": "Replace 5 lines of StringBuilder code with one call."

},

{

"icon": "⚡",

"title": "Optimized",

"desc": "Internal implementation is optimized for large repeats."

},

{

"icon": "📖",

"title": "Clear intent",

"desc": "repeat(3) immediately conveys the purpose."

}

],

"support": {

"state": "available",

"description": "Widely available since JDK 11 (Sept 2018)"

},

"prev": "strings/string-strip",

"next": "strings/string-indent-transform",

"related": [

"strings/string-isblank",

"strings/string-formatted",

"strings/string-chars-stream"

]

}