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rupam bumba
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Java Cheat Sheet by Rupam Bumba

Compares and checkings

String newStr = str1.equals(str2); 
String newStr = str1.equalsIgnoreCase() 
newStr = str1.IsEmpty(); 
newStr = str1.endsWith();
newStr = str1.contains("value"); 
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convertion and replace

newStr = str1.toUpperCase()
newStr = str1.toLowerCase()
newStr = str1.toCharArray(); 
newStr = str1.trim() 
newStr = str1.replace(oldVal, newVal) 
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