Window -> Preferences -> General -> Keys. In “type filter text”, enter “Open Type”.
Select the command described by “Open a type in a Java editor” and click the “Unbind Command” button.
Click in the “Binding” field and press the combination “Shift+Ctrl+T”
Click “Apply” then “Ok”
“Ubind command” removes the shortcut for all commands. Then you manually assign the shortcut to the only command you want to use.
Note: to insert a semicolon in a string instead of at the end of the line, use the backspace key after typing the semicolon.
Eclipse on E: many tips