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Found 4338 Articles for Java 8
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The replace() method in Java is used to replace all occurrences of a given character in a string with another character. In this example, we will replace all occurrences of the character $ with *. Use replace() method to replace all occurrences of a given character in a string. Problem Statement Given a string, replace all occurrences of a specific character with another character using Java. Input THIS IS DEMO LINE $$$ NEW LINE Output THIS IS DEMO LINE *** NEW LINE Steps to Replace All Occurrences of a Given Character in a String Below are the steps to replace all ... Read More
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User replaceAll() method to replace all occurrences of a given string. Let’s say the following is our string.String str = "THIS IS DEMO LINE AND NEW LINE!";Here, we are replacing all occurrences of string “LINE” to “TEXT”str.replaceAll("LINE", "TEXT");The following is the final example.Example Live Demopublic class Demo { public static void main(String[] args) { String str = "THIS IS DEMO LINE AND NEW LINE!"; Sytem.out.println("String = "+str); System.out.println("Replacing all occurrence of string LINE..."); System.out.println("Updated string = "+str.replaceAll("LINE", "TEXT")); } }OutputString = THIS IS DEMO LINE AND NEW LINE! Replacing all occurrence of string LINE... Updated string = ... Read More
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To check the end of a string, use the endsWith() method.Let’s say the following is our string.String str = "demo";Now, check for the substring “mo” using the endsWith() method in an if-else condition.if(str.endsWith("mo")) { System.out.println("The string ends with the word mo"); } else { System.out.println("The string does not end with the word mo"); }The following is the complete example with output.Example Live Demopublic class Demo { public static void main(String[] args) { String str = "demo"; if(str.endsWith("mo")) { System.out.println("The string ends with the word mo"); } else { System.out.println("The string does not ... Read More
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To remove a character at a specified position, use the following logic −Let’s say the following is our string.String str = "The Haunting of Hill House!";We want to remove a character at position 7. For that, use the below logic.// removing character at position 7 int pos = 7; String res = str.substring(0, pos) + str.substring(pos + 1);The following is the complete example with output.Example Live Demopublic class Demo { public static void main(String[] args) { String str = "The Haunting of Hill House!"; System.out.println("String: "+str); // removing character at position 7 int pos = 7; String res = str.substring(0, pos) + str.substring(pos + 1); ... Read More
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Use the Trim() method to remove leading and trailing whitespace from a string. Let’s say the following is our string with white spaces in the beginning and the end.String str = " a ";Now, use the trim() method.str.trim()The following is the final example with output.Example Live Demopublic class Demo { public static void main(String[] args) { String str = " a "; System.out.println("Text = "+str); System.out.println("Text after using trim() method = " + str.trim()); } }OutputText = a Text after using trim() method = a
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Use the + Integer.toHexString() method in Java to convert integer to hexadecimal.Let’s say the following is our integer.int val = 768;Let us convert it to a hexadecimal value.Integer.toHexString(val)The following is the final example with the output.Example Live Demopublic class Demo { public static void main(String[] args) { int val = 768; // integer System.out.println("Integer: "+val); // hex System.out.println("Hex String = " + Integer.toHexString(val)); } }OutputInteger: 768 Hex String = 300
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To convert integer to octal in Java, use the Integer.toOctalString() method.Let’s say the following is our integer.int val = 768;Convert the above integer to octal.Integer.toOctalString(val)The following is the final example.Example Live Demopublic class Demo { public static void main(String[] args) { int val = 768; // integer System.out.println("Integer: "+val); // octal System.out.println("Octal String = " + Integer.toOctalString(val)); } }OutputInteger: 768 Octal String = 1400
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To convert an integer to binary, use the Integer.toBinaryString() method in Java.Let’s say the following is the integer we want to convert.int val = 999;Converting the above integer to binary.Integer.toBinaryString(val)Example Live Demopublic class Demo { public static void main(String[] args) { int val = 999; // integer System.out.println("Integer: "+val); // binary System.out.println("Binary = " + Integer.toBinaryString(val)); } }OutputInteger: 999 Binary = 1111100111
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The java.text.NumberFormat class is used for formatting numbers and currencies as per a specific Locale. Number formats varies from country to countryTo format a number as percentage you need a percentage NumberFormat instance. To achieved this, use the getPercentageInstance() method.Example Live Demoimport java.text.NumberFormat; import java.util.Locale; public class MainClass { public static void main(String[] args) { // Currency of France is Euro NumberFormat n = NumberFormat.getPercentInstance(Locale.FRANCE); // points double points = 1.78; double totalPoints = points * 1000; System.out.println(n.format(points)); System.out.println(n.format(totalPoints)); } }Output178 % 178 000 %
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The getCurrencyInstance() method of the NumberFormat class returns the instance of the NumberFormat class. The java.text.NumberFormat class is used for formatting numbers and currencies as per a specific Locale. Number formats varies from country to countryHere, we have considered a locale.NumberFormat n = NumberFormat.getCurrencyInstance(Locale.FRANCE);Then, we have formatted a double value with the currency.double points = 1.78; System.out.println(n.format(points));The following is the final example.Example Live Demoimport java.text.NumberFormat; import java.util.Locale; public class MainClass { public static void main(String[] args) { // Currency of France is Euro NumberFormat n = NumberFormat.getCurrencyInstance(Locale.FRANCE); // points double points = 1.78; double totalPoints = points * 1000; System.out.println(n.format(points)); ... Read More