{"id":250,"date":"2025-06-24T07:49:49","date_gmt":"2025-06-24T07:49:49","guid":{"rendered":"https:\/\/thetestdata.com\/blog\/?p=250"},"modified":"2025-07-16T10:24:18","modified_gmt":"2025-07-16T10:24:18","slug":"difference-between-string-builder-and-string-buffer","status":"publish","type":"post","link":"https:\/\/thetestdata.com\/blog\/difference-between-string-builder-and-string-buffer\/","title":{"rendered":"Difference between String Builder and String Buffer?"},"content":{"rendered":"\n

Both StringBuilder<\/code> and StringBuffer<\/code> are used for building\/modifying strings without creating new objects each time<\/em>, unlike String<\/code>. But they differ mainly in thread safety<\/strong> and performance<\/strong>.<\/h4>\n\n\n\n

\ud83d\udd04 Key Differences Between StringBuilder<\/code> and StringBuffer<\/code><\/p>\n\n\n\n

Feature<\/th>StringBuilder<\/code><\/th>StringBuffer<\/code><\/th><\/tr><\/thead>
Thread Safety<\/strong><\/td>\u274c Not<\/em> thread-safe<\/td>\u2705 Thread-safe (synchronized methods)<\/td><\/tr>
Performance<\/strong><\/td>Faster (no overhead of synchronization)<\/td>Slower (due to synchronization)<\/td><\/tr>
Introduced In<\/strong><\/td>Java 5<\/td>Java 1.0<\/td><\/tr>
Usage Scenario<\/strong><\/td>When working in a single-threaded context<\/td>When working in a multi-threaded context<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\ud83e\uddea Simple Example<\/p>\n\n\n\n

public class StringBuilderVsBuffer {
public static void main(String[] args) {
StringBuilder sb = new StringBuilder(“Hello “);
sb.append(“World!”);
System.out.println(“StringBuilder: ” + sb);<\/p>\n\n\n\n

StringBuffer sf = new StringBuffer(“Hello “);
sf.append(“Java!”);
System.out.println(“StringBuffer: ” + sf);
}<\/p>\n\n\n\n

}<\/p>\n\n\n\n

\ud83d\udda8 Output:<\/strong><\/p>\n\n\n\n

StringBuilder: Hello World! <\/p>\n\n\n\n

StringBuffer: Hello Java!<\/p>\n\n\n\n

\ud83e\udde0 Quick Tip:<\/p>\n\n\n\n

If you’re not sharing<\/strong> the object across threads, prefer StringBuilder<\/code>\u2014you’ll get better performance.<\/p>\n","protected":false},"excerpt":{"rendered":"

Explore the difference between StringBuilder and StringBuffer in Java. Learn how thread safety and performance impact your choice for mutable string operations.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[17],"tags":[],"class_list":["post-250","post","type-post","status-publish","format-standard","hentry","category-java-interview-questions"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/comments?post=250"}],"version-history":[{"count":2,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/250\/revisions"}],"predecessor-version":[{"id":447,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/250\/revisions\/447"}],"wp:attachment":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/media?parent=250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/categories?post=250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/tags?post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}