In java String Builder Should be Used in case you need to perform concatenate more string together.<\/p>\n
i.e<\/p>\n
\n public String toString()\n {\n return a + b + c ;\n }\n\n\nFor the above code using + will be converted to\n\n\na = new StringBuilder()\n .append(a).append(b).append(c)\n .toString();\n<\/pre>\nFor the above case you can use concat as below but since + will be converted as String Builder its better to use + rather than concat.<\/p>\n
\n public String toString()\n {\n return a.concat(b).concat(c);\n }\n<\/pre>\nThe key is whether you are writing a single concatenation all in one place or accumulating it over time.<\/p>\n
There's no point in explicitly using StringBuilder. <\/p>\n
But if you are building a string e.g. inside a loop, use StringBuilder.<\/p>\n
To clarify, assuming that hugeArray contains thousands of strings, code like this:<\/p>\n
\n...\nString result = \"\";\nfor (String s : hugeArray) {\n result = result + s;\n}\n<\/pre>\nIt should be as below<\/p>\n
\n ...\nStringBuilder sb = new StringBuilder();\n\nfor (String s : hugeArray) {\n sb.append(s);\n}\nString result = sb.toString();\n<\/pre>\n","protected":false},"excerpt":{"rendered":"In java String Builder Should be Used in case you need to perform concatenate more string together. i.e public String toString() { return a + b + c ; } For the above code using + will be converted to a = new StringBuilder() .append(a).append(b).append(c) .toString(); For the above case you can use concat as… Continue reading