--- old/src/java.base/share/classes/java/lang/Thread.java 2014-11-11 17:30:52.641839269 +0300 +++ new/src/java.base/share/classes/java/lang/Thread.java 2014-11-11 17:30:52.549839267 +0300 @@ -145,7 +145,7 @@ registerNatives(); } - private volatile char name[]; + private volatile String name; private int priority; private Thread threadQ; private long eetop; @@ -366,7 +366,7 @@ throw new NullPointerException("name cannot be null"); } - this.name = name.toCharArray(); + this.name = name; Thread parent = currentThread(); SecurityManager security = System.getSecurityManager(); @@ -1119,7 +1119,11 @@ */ public final synchronized void setName(String name) { checkAccess(); - this.name = name.toCharArray(); + if (name == null) { + throw new NullPointerException("name cannot be null"); + } + + this.name = name; if (threadStatus != 0) { setNativeName(name); } @@ -1132,7 +1136,7 @@ * @see #setName(String) */ public final String getName() { - return new String(name, true); + return name; } /**