# String equality and operators

## Concatenation:  + and +=

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbV7KHWQ5XGwedadyh%2Fimage.png?alt=media\&token=f0f27dec-7100-4461-a033-f98b6ec006d1)

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbVBQhjEyJ_Jz39qWS%2Fimage.png?alt=media\&token=174b1bc3-edf9-432f-91e0-d75a6230449a)

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbVLCYKukebsH8p9Gn%2Fimage.png?alt=media\&token=0478a2ff-2f3e-4d0a-a33b-4e67676d602f)

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbVQ23FuBPmE_tlyrC%2Fimage.png?alt=media\&token=70cfea90-b33b-4e51-846a-6884668ad2b1)

```java
package com.test.test1;
public class StringMethods {
	public static void main(String[] args) {
		String day = "OCJA" + "Cert" + "Exam";
		System.out.println(day);
	}
}
```

```java
package com.test.test1;
public class StringMethods {
	public static void main(String[] args) {
		int num = 10;
		int val = 12	;
		String aStr = "OCJA";
		String anotherStr = num + val + aStr;
		System.out.println(anotherStr);
	}
}
```

```java
package com.test.test1;
public class StringMethods {
	public static void main(String[] args) {
		int num = 10;
		int val = 12;
		String aStr = "OCJA";
		String anotherStr = "" + num + val + aStr;
		System.out.println(anotherStr);
	}
}
```

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbWZoNt1i3G2w2AXxP%2Fimage.png?alt=media\&token=c837dc41-1690-4e4b-8999-9daa2e936fe5)

![](https://3494582050-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LSemf7mp1liQa7nfIAC%2F-LTbOgP4UpnyBK4OY9pZ%2F-LTbWxP86C7_0iHo5J-d%2Fimage.png?alt=media\&token=94df0b11-e6b7-436b-9837-c7f1072822d3)

```java
package com.test.test1;
public class StringMethods {
	public static void main(String[] args) {
		String lang = "Java";
		lang += " is everywhere!";
		String initializedToNull = null;
		initializedToNull += "Java";
		System.out.println(initializedToNull);
	}
}
```


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